Can #y=x^3-3x^2-10x # be factored? If so what are the factors ?
Inspection reveals that all three terms have
LHS can be written as
The quadratic in the brackets can be factorized by splitting the middle term
Hence factors are
Take out the common factor of
To factorise the quadratic trinomial, find factors of
Their signs must be different, but there must be more negatives.