For some equations of the form ar2+ bx +c=0 you can solve by factoring, completing the square, or the quadratic formula. How do you decide which method to use when solving a quadratic equation? Is there a method that you think should always be used, or do you think it is more convenient at certain times to use one method over another other? Explain your answer. Use 3x2 - 12x -15 = 0 to help illustrate your point of view.

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