Question

como resolver ×.(×+8,=65

Answer 1

Boa tarde

x*(x + 8) = 65 

x² + 8x = 65

x² - 8x + 16 = 65 + 16 
(x - 4)² = 81

x1 - 4 = 9
x1 = 13

x2 - 4 = -9
x2 = .-5