# Algebra 2

## Educators

KM AG

### Problem 1

Find all the real square roots of each number.
$$225$$

KM
Kimberly M.

### Problem 2

Find all the real square roots of each number.
$$0.0049$$ ### Problem 3

Find all the real square roots of each number.
$$-\frac{1}{121}$$

KM
Kimberly M.

### Problem 4

Find all the real square roots of each number.
$$\frac{64}{169}$$ ### Problem 5

Find all the real cube roots of each number.
$$-64$$

KM
Kimberly M.

### Problem 6

Find all the real cube roots of each number.
$$0.125$$ ### Problem 7

Find all the real cube roots of each number.
$$-\frac{27}{216}$$

KM
Kimberly M.

### Problem 8

Find all the real cube roots of each number.
$$0.000343$$ ### Problem 9

Find all the real fourth roots of each number.
$$16$$

KM
Kimberly M.

### Problem 10

Find all the real fourth roots of each number.
$$-16$$ ### Problem 11

Find all the real fourth roots of each number.
$$0.0081$$

KM
Kimberly M.

### Problem 12

Find all the real fourth roots of each number.
$$\frac{10,000}{81}$$ ### Problem 13

Find each real-number root.
$$\sqrt{36}$$

KM
Kimberly M.

### Problem 14

Find each real-number root.
$$-\sqrt{36}$$ ### Problem 15

Find each real-number root.
$$\sqrt{-36}$$

KM
Kimberly M.

### Problem 16

Find each real-number root.
$$\sqrt{0.36}$$ ### Problem 17

Find each real-number root.
$$-\sqrt{64}$$

KM
Kimberly M.

### Problem 18

Find each real-number root.
$$\sqrt{-64}$$ ### Problem 19

Find each real-number root.
$$-\sqrt{81}$$

KM
Kimberly M.

### Problem 20

Find each real-number root.
$$\sqrt{-81}$$ ### Problem 21

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{16 x^{2}}$$

AG
Ankit G.

### Problem 22

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{0.25 x^{6}}$$ ### Problem 23

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{x^{8} y^{18}}$$

AG
Ankit G.

### Problem 24

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{64 b^{48}}$$ ### Problem 25

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{-64 a^{3}}$$

AG
Ankit G.

### Problem 26

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{27 y^{6}}$$ ### Problem 27

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{x^{8} y^{12}}$$

AG
Ankit G.

### Problem 28

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{32 y^{10}}$$ ### Problem 29

Geometry The formula for the volume of a sphere is $V=\frac{4}{3} \pi r^{3} .$ Find the radius to the nearest hundredth of a sphere with each volume.
$$10 \mathrm{in} .^{3}$$

AG
Ankit G.

### Problem 30

Geometry The formula for the volume of a sphere is $V=\frac{4}{3} \pi r^{3} .$ Find the radius to the nearest hundredth of a sphere with each volume.
$$20 \mathrm{ft}^{3}$$ ### Problem 31

Geometry The formula for the volume of a sphere is $V=\frac{4}{3} \pi r^{3} .$ Find the radius to the nearest hundredth of a sphere with each volume.
$$0.45 \mathrm{cm}^{3}$$

AG
Ankit G.

### Problem 32

Geometry The formula for the volume of a sphere is $V=\frac{4}{3} \pi r^{3} .$ Find the radius to the nearest hundredth of a sphere with each volume.
$$0.002 \mathrm{mm}^{3}$$ ### Problem 33

Find the two real-number solutions of each equation.
$$x^{2}=100$$

KM
Kimberly M.

### Problem 34

Find the two real-number solutions of each equation.
$$x^{4}=1$$ ### Problem 35

Find the two real-number solutions of each equation.
$$x^{2}=0.25$$

KM
Kimberly M.

### Problem 36

Find the two real-number solutions of each equation.
$$x^{4}=\frac{16}{81}$$ ### Problem 37

Arrange the numbers $\sqrt{-64},-\sqrt{-64}, \sqrt{64},$ and $\sqrt{64}$ in order from least to greatest.

AG
Ankit G.

### Problem 38

Boat Building Boat builders share an old rule of thumb for sailboats. The maximum speed $K$ in knots is 1.35 times the square root of the length $L$ in feet of the boat's waterline.
a. A customer is planning to order a sailboat with a maximum speed of 8 knots. How long should the waterline be?
b. How much longer would the waterline have to be to achieve a maximum speed of 10 knots? ### Problem 39

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{0.125}$$

KM
Kimberly M.

### Problem 40

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{\frac{8}{216}}$$ ### Problem 41

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{0.0016}$$

KM
Kimberly M.

### Problem 42

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{\frac{1}{256}}$$ ### Problem 43

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{16 c^{4}}$$

AG
Ankit G.

### Problem 44

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{81 x^{3} y^{6}}$$ ### Problem 45

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{144 x^{3} y^{4} z^{5}}$$

AG
Ankit G.

### Problem 46

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{y^{20}}$$ ### Problem 47

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{-y^{20}}$$

KM
Kimberly M.

### Problem 48

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{k^{15}}$$ ### Problem 49

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{-k^{15}}$$

KM
Kimberly M.

### Problem 50

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{(x+3)^{2}}$$ ### Problem 51

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt{(x+1)^{4}}$$

KM
Kimberly M.

### Problem 52

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt[2 n]{x^{2 n}}$$ ### Problem 53

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt[2 n]{x^{4 n}}$$

KM
Kimberly M.

### Problem 54

Simplify each radical expression. Use absolute value symbols when needed.
$$\sqrt[2 n]{x^{6 n}}$$ ### Problem 55

Open-Ended Find three radical expressions that simplify to $-2 x^{2}$

AG
Ankit G.

### Problem 56

Critical Thinking For what positive integers $n$ is each of the statements true?.
a. If $x^{n}=b,$ then $x$ is an $n$ th root of $b$
b. If $x^{n}=b,$ then $x=\sqrt[n]{b}$ ### Problem 57

Writing Is 10 a first root of 10$?$ Explain.

AG
Ankit G.

### Problem 58

Tell whether each equation is true for all, some, or no values of the variable. Explain your answers.
$$\sqrt{x^{4}}=x^{2}$$ ### Problem 59

Tell whether each equation is true for all, some, or no values of the variable. Explain your answers.
$$\sqrt{x^{6}}=x^{3}$$

AG
Ankit G.

### Problem 60

Tell whether each equation is true for all, some, or no values of the variable. Explain your answers.
$$\sqrt{x^{8}}=x^{2}$$ ### Problem 61

Tell whether each equation is true for all, some, or no values of the variable. Explain your answers.
$$\sqrt{x^{3}}=|x|$$

AG
Ankit G.

### Problem 62

Simplify each radical expression. $n$ is an even number.
$$\sqrt[n]{m^{n}}$$ ### Problem 63

Simplify each radical expression. $n$ is an even number.
$$\sqrt[n]{m^{2 n}}$$

KM
Kimberly M.

### Problem 64

Simplify each radical expression. $n$ is an even number.
$$\sqrt[n]{m^{3 n}}$$ ### Problem 65

Simplify each radical expression. $n$ is an even number.
$$\sqrt[n]{m^{4 n}}$$

KM
Kimberly M.

### Problem 66

Simplify each radical expression. $n$ is an odd number.
$$\sqrt[n]{m^{n}}$$ ### Problem 67

Simplify each radical expression. $n$ is an odd number.
$$\sqrt[n]{m^{2 n}}$$

AG
Ankit G.

### Problem 68

Simplify each radical expression. $n$ is an odd number.
$$\sqrt[n]{m^{3 n}}$$ ### Problem 69

Simplify each radical expression. $n$ is an odd number.
$$\sqrt[n]{m^{4 n}}$$

AG
Ankit G.

### Problem 70

Which equation has more than one real-number solution?
$$\begin{array}{llll}{\text { A. } x^{2}=0} & {\text { B. } x^{2}=1} & {\text { C. } x^{2}=-1} & {\text { D. } x^{3}=-1}\end{array}$$ ### Problem 71

Which number is greatest?
$$\begin{array}{lllll}{\text { F. } \sqrt{0.5}} & {\text { G. } \sqrt{0.5}} & {\text { H. } \sqrt{0.5}} & {\text { J. } \sqrt{0.5}}\end{array}$$

AG
Ankit G.

### Problem 72

Which statement is NOT true?
$$\begin{array}{ll}{\text { A. }-3=-\sqrt{9}} & {\text { B. }-3=-\sqrt{-9}} \\ {\text { C. }-3=\sqrt{-27}} & {\text { D. }-3=-\sqrt{81}}\end{array}$$ ### Problem 73

Absolute value symbols are needed when you simplify some of these expressions. Which ones are they?
$$\text { I. }\sqrt{-x^{3} y^{6}} \quad \text { II. } \sqrt{x^{2} y^{4}} \quad \text { III. } \sqrt{x^{8} y^{12}} \quad \text { IV. } \sqrt{x^{4} y^{6}}$$
F. II and III only
H. II, III and IV only
G. II and IV only
J. II, III and IV

AG
Ankit G.

### Problem 74

For what values of $x$ and $y$ does $\sqrt{x^{2} y^{4}}$ equal $\sqrt{x^{3}} y^{6} ?$ Explain your answer. ### Problem 75

Expand each binomial.
$$(x+y)^{5}$$

AG
Ankit G.

### Problem 76

Expand each binomial.
$$(2-3 y)^{4}$$ ### Problem 77

Expand each binomial.
$$(3 x-5)^{6}$$

AG
Ankit G.

### Problem 78

Expand each binomial.
$$(2 a-b)^{7}$$ ### Problem 79

Write each function in factored form. Check by multiplying.
$$y=4 x^{3}-49 x$$

KM
Kimberly M.

### Problem 80

Write each function in factored form. Check by multiplying.
$$y=81 x^{2}+36 x+4$$ ### Problem 81

Write each function in factored form. Check by multiplying.
$$y=4 x^{3}+8 x^{2}+4 x$$

KM
Kimberly M.

### Problem 82

Write each function in factored form. Check by multiplying.
$$y=12 x^{3}+14 x^{2}+2 x$$ ### Problem 83

Rewrite each equation in vertex form.
$$y=3 x^{2}-7$$

KM
Kimberly M.

### Problem 84

Rewrite each equation in vertex form.
$$y=-2 x^{2}+x-10$$ $$y=\frac{x^{2}}{4}+2 x-1$$