SOLUTION: how do i make an equation with the solutions being -3i 3i and 4

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: how do i make an equation with the solutions being -3i 3i and 4       Log On


   



Question 1007671: how do i make an equation with the solutions being -3i 3i and 4

Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
If these are the roots, then
(x + 3i)(x - 3i)(x - 4) = 0
is the equation in question.
Just multiply this out and get
(x^2 + 9)(x - 4) =
x^3 - 4x^2 + 9x - 36 = 0