Question

se A=2x+6y-9,B=2x+2y-3 e c=+4x-y+4, então A x b + c

Answer 1

Alternativa D.

A - B:

2x + 4y + 5 - (2x + 2y - 3)

2x + 4y +5 -2x - 2x + 3

2y + 8

(A-B) + C:

2y + 8 + 4y - y + 4

4x + y + 12