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3-56.

Multiply the expressions in parts (a) and (b). Solve the equations in parts (c) and (d). Homework Help ✎

  1. Use a rectangular area model.

  1. It may help to rewrite this expression as
    .

  1. Begin by multiplying. The x²-terms can be removed by subtracting them from both sides of the equation.

  1. Rewrite as .