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2 May, 10:41

What is (81x^2 - 4y^2) square units factored?

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  1. 2 May, 12:43
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    To solve, use the difference of squares rule. (a^2-b^2) = (a-b) (a+b). In your equation, your a^2=81x^2 and your b^2=4y^2, making your a=9x and your b=2y. This makes your factored form (9x-2y) (9x+2y).
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