### Home > PC3 > Chapter 4 > Lesson 4.3.2 > Problem4-122

4-122.

Solve each equation.

1. $x^3-3x^2-10x=0$

$x(x^2−3x−10)=0$

1. $c^4-12c^2-64=0$

Factor.
$(c^2\pm?)(c^2\pm?)=0$

The original equation has $c^4$, so you should be looking for four solutions.