Simplifying Rational Expressions

For which value is the expression undefined?

• -4
• -3
• 3
• 0

Which value of x makes the expression undefined?

• -2
• 2
• -6
• -3

What value(s) make the expression undefined?

• x = - 3 and x = 4
• x = 3 and x = - 4
• x = 3 only
• x = - 4 only

Find the domain of the function.  $f\left(x\right)=\frac{3x}{x^2-121}$  

•  $\left\{x\ne-6,5\right\}$  

•  $\left\{x\ne121\right\}$  

•  $\left\{x\ne11\right\}$  

•  $\left\{x\ne-11,11\right\}$  

Simplify.

• 3h^1.25

• 3h⁸⁰

• 12h²

• 3h²

Simplify.

• -9a³

• -9a⁶

• -24a⁶

• 30a⁶

Simplify

• (x-9)/(x+9)
• 1/(x-9)
• (x+9)
• 1/(x+9)

Which of the following is equivalent?
(7-m)

• (m-7)
• -(m+7)
• -(7+m)
• -(m-7)

20x³/(5x+10)

• A.4x³/(x+2)
• B.4x³/(x+10)
• C.2x³/(5x+1)
• D. 2x³/(x+5)

Simplify.

• -4x²y

• 4x²y

• -4x⁸y³

• -4x³y²