Question

\/x+7=x-5 como resolver?

Answer 1

x + 7 = (x-5)²

x + 7 = x² +25 - 10x

0 = x² -11x + 18

Δ = 121 - 4.1.18

Δ = 121 - 72

Δ = 49

x1 = 11 + 7   / 2 = 9

x2 = 11 - 7   /2 = 2

S={2,9}