Question

factorise xcube + 2x square _ 5x_ 6​

Answer 1

Let 8 x cube + 2 x square - 5 x- 6 be f x

if we keep X equals to - 1

then fX becomes zero

therefore ,

X + 1 is one of the factor of the f x

if we divide fX by X + 1 we will get

X squared + X - 6

by using splitting middle term we can get f x = ( X + 1 )(X - 2)(X +3)