Question

efetue as multiplicações:
a) x.(x-5).(x+3)

b) (x+6).(x-4).(x+1)

Answer 1

a) x.(x-5).(x+3)
x.(x²+3x-5x-15)
x.(x²-2x-15)
x³-2x²-15x
b) (x+6).(x-4).(x+1)
x²-4x+6x-24.(x+1)
x³+x²-4x²-4x+6x²+6x-24x-24
x³+6x²-4x²-x²+6x-24x-24
x³+6x²-5x²-18x-24
x³+x²-18x-24