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What method(s) would you choose to solve the equation? Explain your reasoning.

4x^2-48=0
a. Quadratic formula, graphing; the equation cannot be factored easily since the numbers are large.
Selected:b. Square roots; there is no x-term.
c. Factoring; the equation is easily factored.
d. Quadratic formula, completing the square or graphing; the coefficient of x2-term is 1, but the equation cannot be factored.

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1 answer

  1. 4x^2-48=0

    No x term, this is the easiest type, first divide each term by 4 to get
    x^2 - 12 = 0
    add 12 to both sides
    x^2 = 12
    take √ of both sides
    x = ± √12 = ± 2√3

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    Reiny

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