Question

Resolva a equação, sendo U = R:

(x + 6)²- (x + 6). (x - 6) = 0

Answer 1

(x² + 12x + 36) - (x² - 6x + 6x - 36) = 0
x² + 12x + 36 -x² + 36 = 0
12x = - 36 - 36
12x = - 72
x = -72/12 -> -6