the question is
given that f(x) = 2xcubed + 9xsqaured + 10x + 3
part a is easy just says show that -3 is a root of F(x), if you sub -3 in as x you get 0.
but part b says
Express 10/f(x) as partial fractions
now when theres a quadractic as the denominator thats fine i can split them up, but i dont know how to factorise that cubic equation to get 3 seperate fractions, any help?? been stuck on this all day.