Question

Calcule os produtos notaveis
3(x+y)
2x(x+y)
4x(a+b)
(x+5).(x+2)
(x+7).(x-4)
(5x-2).(2x-1)

Answer 1

3x +3y
2x² +2xy
4xa +4b

x౽+2x+5x+10
x౽ +7x +10

x²-4x+7x-28
x² +3x -28

10x²-5x-2x+2
10x² -7x +2