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5-50.
  1. Multiply each of the following expressions. Show all of your work. Homework Help ✎

    1. (x + 3)(4x + 5)

    2. (−2x − 4)(3x + 4)

    3. (3y − 8)(−x + y)

    4. (y − 4)(3x + 5y − 2)

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.

4x2 + 12x + 5x + 15

4x2 + 17x + 15

Follow the steps in part (a).

Follow the steps in part (a).

−6x3 − 20x2 − 16x

Follow the steps in part (a).

3xy + 5y2 − 22y − 12x + 8