### Home > A2C > Chapter 11 > Lesson 11.2.5 > Problem 11-104

11-104.

Without graphing, find where each of the following curves crosses the *x*-axis. (Find the *exact* points!)

Factor.

*f*(*x*) = (*x*+ 3)(*x*− 4)(−3, 0) and (4, 0)

Use the quadratic formula.

(−1.5, 0) and (3, 0)

See part (b).

See part (b).

It does not intersect the

*x*-axis.

*x*is a common factor.After you factor out

*x*, factor or use the quadratic formula to find the roots of the rest.

See part (e).