Question

Efetue as seguintes multiplicações
a) (2x+8).(4x+1)
b) (2x-2).(x+4)

Answer 1

a) (2x+8)(4x+1) = 2x.4x +2x.1 +8.4x +8.1 = 8x²+2x+32x+8= 8x²+34x+8 ----- b) (2x-2)(x+4) = 2x.x +2x.4 -2.x -2.4= 2x²+8x-2x-8 = 2x²+6x-8