Question

factorise xcube+2x square-x-2

Answer 1

Answer:

(x+1) (x-1) (x+2).

Step-by-step explanation:

3²+2x²-x-2

x²(x+2) -1(x+2)

=(x²-1) (x+2)

=(x+1) (x-1) (x+2).

hence proof