Question

2- Efetue as multiplicações a seguir: a) 2x(x²-2x+5) b) (x+5).(x+2) c) (3x+2).(2x+1) d) (x+7).(x-4)

Answer 1

Resposta:

a) 2x(x²-2x+5)

${2x}^{3} - {4x}^{2} + 10x$

b) (x+5).(x+2)

${x}^{2} + 2x + 5x + 10 \\ {x}^{2} + 7x + 10$

c) (3x+2).(2x+1)

${6x}^{2} + 3x + 4x + 2 \\ {6x}^{2} + 7x + 2$

d) (x+7).(x-4)

${x}^{2} - 4x + 7x - 28 \\ {x}^{2} + 3x - 28$