Write an equation with solutions -1, 2, and 3.
Using the factor theorem (This states that if \(r\) is a solution to \(f(x)=0\), then \((x-r)\) is a factor of \(f(x)\)), we have \(f(x)=(x+1)(x-2)(x-3)=x^3-4x^2+x+6\).