Question

Resolva:
(X+5).(x+2)
(3x+2).(2x+1)
(X+7).(x-4)
(3x+4).(2x-1)

Answer 1

a) (x+5)*(x+2)
x*x +x*2+5*x+5*2
x²+2x+5x+10
x²+7x+10
b)(3x+2)*(2x+1)
3x*2x+3x*1+2*2x+2*1
6x²+3x+4x+2
6x²+7x+2
c) (x+7)*(x-4)
x*x-4*x+7*x-7*4
x²-4x+7x-28
x²+3x-28
d)(3x+4)(2x-1)
3x*2x-3x*1+4*2x-4*1
6x²-3x+8x-4
6x²+5x-4