The polynomial f(x) has degree 3. If f(-1)=15, f(0)=0, f(1)=-7, and f(2)=0, then what are x-intercepts of the graph f?

I started with

\(f(x)=ax^3+bx^2+cx+d\)

d is super easy to find

then I formed simultaneous equations which will be used to find a,b and c

You do this by substitution

and then solved them using matrices.

Do what you can and get back to us - show us what you have done.