### Home > CAAC > Chapter 5 > Lesson 5.1.5 > Problem 5-50

5-50.

Use a generic rectangle to multiply.

Put the products on the outside of the rectangle.

Use length times width to find the areas of the small rectangles.

Write the total area as a sum.

4*x*^{2} + 12*x* + 5*x* + 15

4*x*^{2} + 17*x* + 15

Follow the steps in part (a).

Follow the steps in part (a).

−6*x*^{3} − 20*x*^{2} − 16*x*

Follow the steps in part (a).

3*xy* + 5*y*^{2} − 22*y* − 12*x* + 8