### Home > A2C > Chapter Ch4 > Lesson 4.3.2 > Problem 4-155

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

Use a generic rectangle to multiply.

In a rectangle,

. Find the area of each small rectangle inside the generic rectangle. **2 by 2 square, left edge labeled, top, x, bottom, minus 1. Bottom edge labeled, left, x, right, + 1.****Added labels to interior: top left, x squared, top right, 1, x, bottom left, 1, x, bottom right, negative 1.**The total area of the generic rectangle, or

.First, multiply

and .Then use a generic rectangle to multiply that result by . **2 by 2 square, left edge labeled, top, 2, x squared, bottom, + 2, x, Bottom edge labeled, left, x, right, + 1.****Added labels to interior: top left, 2, x to the third, top right, 2, x squared, bottom left, 2, x squared, bottom right, 2, x.**

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: