Square Root Functions

Question 20 • AZ-Common Core Algebra II A

Check your answer. Did you identify these three errors correctly?

Answer

The student did not switch both instances of x with y. He should have written x = y2 + 12y.

He wrote only the principal square root instead of using the ± sign.

The domain is incorrect. For the radicand to be greater than or equal to zero, x must be less than or equal to zero. It should be x 0.

Square Root Functions

The Cube Root Function

Graphing Radical Functions