Verified answer

1)3x²y

2)-12x³y³

3)-ac³/2

xy² + xy² + x2y

=y²(x+x)+x²y

=y²(2x)+x²y

=2xy²+x²y

2y²+xy=0

x=-2y²/y

x=-2y

4x².(-3xy³)

=-12x³y³

(-8ac5) : (16c2)

=(-8ac5) *1/ (16c2)

=ac³

2x*y^2 + x^2*y =xy(2y+x)

4*x^2*(-3xy^3) =-12x³y³

(-8ac^5) ÷ (16c^2) =-ac³ /2

a) xy2 = 2xy = x2y, logo, nós temos 2xy + 2xy +2xy = 6xy

b) 8x(-9xy) = -72x²y

c) -40ac / 32c = -1.25a