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8 May, 17:36

Find the square of 2m^2 - 2/3n^2

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  1. 8 May, 18:39
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    4m^4 - 8/3m^2 n^2 + 4/9n^4

    Step-by-step explanation:

    (2m^2 - 2/3n^2) (2m^2 - 2/3n^2)

    = 2m^2 (2m^2 - 2/3n^2) - 2/3n^2 (2m^2 - 2/3n^2)

    = 4m^4 - 4/3m^2 n^2 - 4/3m^2n^2 + 4/9n^4

    = 4m^4 - 8/3m^2 n^2 + 4/9n^4
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