Question

(y-1)(y-3)(y-5) как раскрыть скобки

Answer 1

= (y^2-3y-y+3)(y-5)= y^3-3y^2-y^2+3y-5y^2+15y+5y-15

Answer 2

(y-1)(y-3)(y-5)  = 1. (y-1)(y-3) = y²-3y-y+3 = y²- 4y+32. (y²- 4y+3)(y-5) = y³-5y²-4y²+20y+3y-15 = y³-9y²+23y-15