NyripkayleFail NyripkayleFail

29-10-2015
Mathematics

contestada

Which is equivalent to (9y2 – 4x)(9y2 4x), and what type of special product is it?

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29-10-2015

81y4 - 36xy2 - 36xy2 + 16x2
81y4 - 72xy2 + 16x2

that's my answer

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