Question

Which number line represents all of the values of x for the equation x2 = 16?

Answer choices attached

Answer 1

We are given with an expression of x² = 16 and we need to solve for the equivalent representation in the choices. The solution is shown below:
x² = 16
Perform square root,
x = +/- √16
x = +/- 4
x1 = +4 and x2= -4

The answer is are the letter "C" or the third in the choices.