Question

(X-3)elevado ao quadrado=9

Answer 1

(x-3)²= 9

(x-3)(x-3) = 9

x²-3x -3x +9= 9

X²-6x +9+9 = 0

X²-6x = 0

X(x-6) =0

X' =0

X-6 =0

X = 6

X" = ±6