Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

Find the unknown.$$x^{2}=18$$

$$\pm 3 \sqrt{2}$$

Algebra

Chapter 0

Reviewing the Basics

Section 2

Solving Equations of the Form $a x^{2}-b=0$

Equations and Inequalities

Missouri State University

Harvey Mudd College

University of Michigan - Ann Arbor

Idaho State University

Lectures

00:33

Find the unknown.$$x^{…

00:32

01:23

Find the unknown.$$(x-…

00:47

02:17

Find the unknown.$$\fr…

02:16

Find the unknown.$$(3 …

00:42

01:44

Find the unknown.$$(x+…

00:56

01:24

00:22

Solve each equation.$x…

00:50

Solve for the unknown vari…

00:58

Find the unknown.$$8 x…

01:06

Solve.$$x^{2}-3 x-18=0…

is it clear? So when you right here. So we're going to find for X in the equation, X square equals 18. Um, we would want to to square root on both sides. Go. We notice that 18 we can't perfectly score rooted, but we know that 18 is equal to nine times two. And we know that we could square root both of these numbers So we get screwed of X square is equal to square root of nine times the square root of two. This becomes X is equal to plus and minus three square root to

View More Answers From This Book

Find Another Textbook

01:00

Find the unknown.$$5 x^{2}-7=2 x^{2}+20$$

01:03

Complete the square in each of the following by putting in the form $(x+B)^{…

03:12

In each of the following exercises, solve the given inequality.$$x^{2}-7…

00:36

Find the unknown.$$y^{2}-49=0$$

Find the unknown.$$8 x^{2}-96=0$$

02:24

Solve for the indicated variable.$$\text { For } x: 5 x-2 y=19$$

01:58

In each of the following exercises, solve the given inequality.$$(3 x+5)…

00:46

Find the unknown.$$w^{2}=-36$$

01:40

Find the unknown.$$6 w^{2}+96=0$$

01:22