Question

(x-6) (x-6) = 2 (x+18)

Answer 1

(x-6)² = 2x+36

x² -12x + 36 = 2x + 36 

x² - 12x - 2x + 36 - 36 = 0 

x² - 14x = 0 

x(x-14) = 0

x' = 0

x'' - 14 = 0

x''= 14                           S = { 0 , 14 }                        ok