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10 July, 04:30

6x2 - 21 = 33; Solve and what are the x-intercepts of this quadratic equation?

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  1. 10 July, 04:35
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    Solving by factoring.

    6x^2 - 21 - 33 = 0

    6x^2 - 55 = 0

    x^2 - 9 = 0

    (x-3) (x+3) = 0

    x - 3 = 0

    x + 3 = 0

    x1 = - 3

    x2 = 3
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