Question

(x) (x+2) = 99
x2 + 2x = 99 ​

Answer 1

(x) (x+2) = 99

x² + 2x = 99

x² + 2x - 99 = 0

x           + 11

x             - 9

11x - 9x = 2x

(x +11)(x - 9) = 0

x + 11 = 0       x - 9 = 0

x = -11      x = 9

CS = (-11; 9)

Eternamente axllxa