### Home > CCA2 > Chapter Ch10 > Lesson 10.2.2 > Problem 10-128

10-128.

Without graphing, find where each of the following curves crosses the x-axis. (Find the

*exact*points!) Homework Help ✎*f*(*x*) =*x*^{2}−*x*− 12*f*(*x*) = 2*x*^{2}− 3*x*− 9*f*(*x*) = 2*x*^{2}+*x*– 7*f*(*x*) = 3*x*^{2}– 2*x*+ 7*f*(*x*) = 3*x*^{3}+ 2*x*^{2}– 8*x**f*(*x*) = 2*x*^{3}+ 2*x*^{2}+ 13*x*

For each equation, let *f*(*x*) = 0. Then solve by factoring and/or using the Quadratic Formula.

*x* = −1.5, 3

Each term has an *x*.