### Home > A2C > Chapter 4 > Lesson 4.3.2 > Problem 4-155

4-155.

Multiply the expressions in parts (a) through (c) to remove the parentheses.

Use a generic rectangle to multiply.

In a rectangle, (length)(width) = area. Find the area of each small rectangle inside the generic rectangle.

The total area of the generic rectangle, or

.First, multiply

and .Then use a generic rectangle to multiply that result by .

Now use a generic rectangle.Find the

- and-intercepts of. The factors in part (c) should be useful.The

-intercepts are where.The

-intercept is where:from part (c). Using the Zero Product Property: