Given that \(f(x)=6x^3+5x^2-17x-6\),
- find the remainder when \(f(x)\) is divided by \(x-2\),
- find the remainder when \(f(x)\) is divided by \(x+2\),
Would it help us to recall the remainder theorem?
\(\qquad\) iii. factorise \(f(x)\) completely.
Can we find a remainder that is zero? What does this tell us about the roots of \(f(x)\)?
- Given that the expression \(ax^3-x^2+bx+18\) is exactly divisible by \(x^2+x-6\), find the value of \(a\) and \(b\).
Would it help to try to factorise \(x^2+x-6\)?