Question

factorise y^3+y^2-y-1

Answer 1

Hey mate! Here is your answer.

y^3+y^2-y-1

y^2(y+1) -1(y+1)

(y^2-1)(y+1)

Hope it helps:)

Answer 2

by trial

we get

(y+1) is a factor

hence the other factors are (y+1) and (y-1)

hence (y+1)²(y-1) is the answer