Question

resposta de 7x+7y+bx+by e ax-ay-bx+by

Answer 1

7x + 7y + bx + by = 7 · (x + y) + b (x + y) = (x + y) · (7 + b)

ax - ay - bx + by = a · (x - y) - b · (x - y) =  (x - y) · (a - b)