Square root

Square root

Fill in the Blank

Definition: If a is a (1)_____________ number then

 $\sqrt{a}$  denotes the (1)______________number whose (2)___________ is a. 

Examples

•  $\sqrt{9}=$  

• 3

•  $\sqrt{\left(-5\right)^2}=$  

• 5

•  $\sqrt{\left(x-2\right)^2}=$  

•  $\left|x-2\right|$  

Fill in the Blank

Try calculating the value of

 $\sqrt{18}\times\sqrt{8}$  without using a calculator. (Hint: taking the square is the inverse of taking the square root of nonnegative numbers)

Identities of square roots

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