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    Question

    If one of the roots of the equation x² – 18x + 72 = 0

    is 6, then what is the other root?
    A 12 Correct Answer Incorrect Answer
    B 17 Correct Answer Incorrect Answer
    C 13 Correct Answer Incorrect Answer
    D 11 Correct Answer Incorrect Answer

    Solution

    x² – 18x + 72 = 0 x² – 12x-6x + 72 = 0 = x(x-12)-6(x-12) =0 =(x-6) (x-12) =0 When –(x-12) =0 x=12.

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