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29 October, 04:56

Solve n^2-6n=72 by completing the square

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  1. 29 October, 06:06
    0
    -6 & 12

    Step-by-step explanation:

    [n² - 2 (n) (3) + 3²] - 3² = 72

    (n-3) ² - 9 = 72

    (n-3) ² = 81

    (n-3) = + / - 9

    n-3 = 9 n = 12

    n-3 = - 9 n = - 6
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