Question

Tamara found the solution of x^2=64 to be x=8.

What mistake did Tamara make in finding her solution?

A. She found the incorrect square root of 64.

B. She only found the square root of one side of the equation.

C. She only found the positive square root, not the negative square root

D. She found the cube root of 64 instead of the square root.

Answer 1

IT'S D!

Explanation:

It just took the assignment and I can confirm it's D

"She only found the positive square root, not the negative square root."

Answer 2

C. She only found the positive square root, not the negative square root

Explanation:

Tamara found the solution of x^2=64 to be x=8.

`x^2= 64`

To remove square , we take square root from both sides

When we take square root we use + and -

Because square of positive and negative numbers are same

`x^2= 64`

`√(x^2) =√(64)`

x=+-8

x=-8 , x=8

To we got two values for x

She only found the positive square root, not the negative square root