x(6 + x)(x + -4) = 24x ... + 2x2 + x3 = 0 Factor out the Greatest Common Factor (GCF), 'x'. x(-48 + 2x + x2) = 0 ... Set the factor '(-8 + -1x)' equal to zero and attempt to solve: Simplifying -8 + -1x = 0 ... box will make the calculator automaticallysolve for the first variable it sees.