4. Expand and simplify the following expressions: a) 3x^2(-4 + 7x + 5x^2) (-12x^2 + 21x^3 + 15x^4) = 9x + 3x^2 b) f(x) = (x - 5)(x + 3) 5x + 1x + 3x^2) 15 =(726) 15
Added by Olivia B.
Close
Step 1
Step 1:** Multiply 3x^2 by -4: \[3x^2 \times -4 = -12x^2\] ** Show more…
Show all steps
Your feedback will help us improve your experience
Kathleen Carty and 99 other Algebra educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Which expression equals $\frac{5 x}{x^{2}-9}-\frac{4 x}{x^{2}+5 x+6} ?$ A. $\frac{7 x}{(x-3)(x+3)(x+2)}$ B. $\frac{x^{2}-2 x}{(x-3)(x+3)(x+2)}$ C. $\frac{x^{2}+22 x}{(x-3)(x+3)(x+2)}$ D. $\frac{9 x^{2}-2 x}{(x-3)(x+3)(x+2)}$
Rational Functions
Adding and Subtracting Rational Expressions
Simplify each expression. a. $x^{3}\left(x^{2}\right)$ b. $x^{4}\left(3 x^{5}\right)$
Prerequisites
Exponents and Radicals
3
Sanchit J.
Recommended Textbooks
Elementary and Intermediate Algebra
Algebra and Trigonometry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD