How to solve five times X minus two square equals 125?

Answer 1

5 (x - 2)2 = 125

Divide each side of the equation by 5:

(x - 2)2 = 25

Take the square root of each side:

x - 2 = sqrt(25) = +5 and -5

The first solution:

x - 2 = 5

x = 7

The second solution:

x - 2 = -5

x = -3