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17 May, 03:44

Fifteen times the square of a non-zero number is equal to 20 times the number.

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  1. 17 May, 03:52
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    The square of a number is n^2. So

    15n^2=20n subtract 20n from both sides

    15n^2-20n=0 factor our 5n

    5n (3n-4) = 0, since we are told that n does not equal zero ...

    3n-4=0

    3n=4

    n=4/3
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