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5-37.
  1. Multiplica cada una de las siguientes expresiones. Homework Help ✎

    1. (x + 4)(x − 14)

    2. (2m + 5)(2m − 1)

    3. (x − 9)(x + 9)

    4. (3y + 2)2

Use generic rectangles to multiply. See problem 3-69 for an example.

2m2 + 8m − 5

x2 − 81