Question

X (X-3) - 2 (X-3) = 6

Answer 1

x (x -3) -2 (x-3) =6

x² -3x -2x +6 -6 =0

x² -5x  = 0

delta = b² - 4.a.c

delta = -5 ² - 4.1.0

delta = 25 - 0

delta = 25

x' = -b + - raiz de 25/2.a

x' = -(-5) + 5 x`' = 10/2 = 5

x" = -(-5) - 5     x" = 0/2    x" = 0

resposta  x = 5 e 0