### Home > PC > Chapter 6 > Lesson 6.2.1 > Problem 6-75

6-75.

Solve the following equations. Homework Help ✎

*x*^{2}− 4*x*= 21(

*x*− 2)(*x*+ 1) = 43 +

1. Set everything = 0

2. Factor or use the quadratic formula.

3. How many answers should you have?

Set the entire function = 0.

Multiply each term by *x*^{2}.

Square both sides first.