Question

10-Sendo: A = x - 2y

B = 2x + y

C = y + 3

resolva:


a) A + B=

b) B – C=

c) A . C=​

Answer 1

Resposta:

a) x-2y+2x+y = 3x-Y

b) 2x+y-Y+3 = 2x+3

c) (x-2y).(y+3) = xy+3x-2x²-6y = -2x²+3x+xy-6y