Question

Reduza os termos semelhantes 9xy2-ab+3xy2-3ab=

Answer 1

$9xy^2-ab+3xy^2-3ab = \\(9xy^2+3xy^2)+(-ab-3ab) = \\3xy^2(3 + 1) -ab(1 + 3) = \\3xy^2 \cdot 4 - ab \cdot 4 = \\4(3xy^2 - ab)$