Question

Solve: -5√x= -15 a: x=-9 b: x= -7 c: x=9 d: x=7

Answer 1

The answer is C: x = 9

Answer 2

Divide both sides by -5
Sqrt(x) = 3
We want to isolate x to solve for it. The opposite of a square root is a square, so square both sides.
x = 9
It can't be -9 because the square root of negative numbers are not real numbers.