Question

alguem me ajuda b) ax-ay-bx+by c)
$6x ^{2} + 15x - 4xy - 10y$
d)20x-20y-3bx+3by

Answer 1

b)   a(x-y)-b(x-y)=(a-b)(x-y)

3x(2x+5)-2y(2x+5)=(3x-2y)(2x+5)

d) 20(x-y)-3b(x-y)=(20-3b)(x-y)