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6-66.
  1. Use generic rectangles to multiply each of the following expressions. Homework Help ✎

    1. (x + 2)(x − 5)

    2. (y + 2x)(y + 3x)

    3. (3y − 8)(−x + y)

    4. (x − 3y)(x + 3y)

Draw a generic rectangle.

Multiply the value of the column and the value of the row to find the value of each box in the rectangle.

(x + 2)(x − 5) = x² − 3x − 10

See the hints in part (a).

(y + 2x)(y + 3x) = y² + 5xy + 6x²

See the hints in parts (a) and (b).

See the hints in part (a).