Resposta :
Resposta:
a) A + B
4x + 2y + 2xy - 6 + 3x + 4y - 2xy + 4
7x + 6y -2
b) B - C
3x + 4y - 2xy + 4 - (-x - y + 4)
3x + 4y - 2xy + 4 + x + y - 4
4x + 5y - 2xy
c) 2B
2 × (3x + 4y - 2xy + 4)
6x + 8y - 4xy + 8
d) A/2
4x + 2y + 2xy - 6
[tex]\frac{4x + 2y + 2xy - 6}{2}[/tex]
[tex]\frac{2(2x + y + xy - 3)}{2}[/tex]
2x + y + xy - 3