Question

Quanto fica (y-5)(2y+1)(y-3)?

Answer 1

Bom vamos la,temos do enunciado que:

(y-5)(2y+1)(y-3)
(2y.y+y-5.2y-5)(y-3)
(2y²+y-10y-5)(y-3)
(2y²-9y-5)(y-3)
(2y².y-9y.y-5y-3.2y²-3(-9y)-5(-3))
(2y³-9y²-5y-6y²+27y+15)
(2y³-15y²+22y+15)