one zero of f(x)=2x^3-9x^2-32x-21 is x=7 . Find other zeros.

Question

one zero of f(x)=2x^3-9x^2-32x-21 is x=7 . Find other zeros.

Answer 1

Divide f(x) by (x-7).  The quotient will be a quadratic equation.  You can then factor the quadratic or use the quadratic formula to find the remaining two roots.