Evaluate Square Roots and Cube Roots

Evaluate Square Roots and Cube Roots

8.EE.2

Find a square root or cube root

• For square roots

   $\sqrt{x}$  , ask yourself, "What number times itself equals x ?"

• For cube roots, ask yourself, "What number times itself , three times, equals x ?"

Multiple Choice

What is the cube root of 64?

• 2

• 4

• 8

• 16

Multiple Choice

Which of these is a solution to the equation

 $x^2=5$  ?

•  $x=\pm\sqrt{3}$  

•  $x=\pm\sqrt{5}$  

•  $x=\pm\sqrt{10}$  

•  $x=\pm\sqrt{25}$  

Multiple Select

Select ALL possible values for the equation

 $x^2=200$  .

•  $10\sqrt{20}$  

•  $100\sqrt{2}$  

•  $10\sqrt{2}$  

•  $\sqrt{200}$  

Multiple Select

Which of these statements is correct? Select all that apply.

• A solution to the equation
  $x^3=216$ is $x=6$ .
  

• A solution to the equation
  $x^2=64$ is $x=4$ .
  

• A solution to the equation
  $x^2=81$ is $x=9$ .

• A solution to the equation
  $x^3=8$ is $x=24$ .

Multiple Select

Which of these is a solution to the equation

 $x^3=36$   or  $x^2=42$  ? Select all that apply.

•  $x=\sqrt{36}$  

•  $x=\sqrt{42}$