Given that f(x) =px^3+23x^2+qx-8
And f(-1)=15 and f(-2) =48
I) find values of p and q (I got p equals 6 and q equals -6)
2) use remainder theorem to factorise the expression completely.
I wasn't sure how to use the remainder theorem to factorise this, Im not sure if using the factor theorem would be accepted. I tried using long division to somehow factorise it but I'm not sure how.
Any help or explanation would be much appreciated
From GCSE to A level, it's all changing