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20 July, 01:08

Write as a polynomial: (-3xy + a) (3xy + a)

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  1. 20 July, 04:34
    0
    a^2 - 9x^2y^2

    Step-by-step explanation:

    (-3xy + a) (3xy + a) =

    = (a - 3xy) (a + 3xy)

    This is the product of a sum and a difference: (a + b) (a - b) = a^2 - b^2

    = a^2 - 9x^2y^2
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