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Although the Quadratic Formula always works as a strategy to solve quadratic equations, it is not always the most efficient method. For example, sometimes, a faster method is to factor and use the Zero Product Property. For each equation below, choose the method you think is most efficient to solve the equation. Homework Help ✎

  1. x2 + 7x – 8 = 0

    Note the expression in this equation can be factored.

  1. (x + 2)2 = 49

    Notice that 49 is a perfect square.

  1. 5x2x – 7 = 0

    Note the expression in this equation cannot be factored.

  1. x2 + 4x = –1

    Adding 4 to both sides will create a perfect square.