Question 957112
I'm assuming the third side is the hypotenuse.


(5x)^2 + (x + 8)^2 = (5x - 4)^2
25x^2 + x^2 + 16x + 64 = 25x^2 - 40x + 16
x^2 + 16x + 64 = -40x + 16
x^2 + 56x + 48 = 0


Use the quadratic formula to find x.