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Expand the polynomial: (5/8 x + y^5)(-5/8 x - y^5)

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Answer: -25x^2/64 - 5xy^5/4 -y^10

First you multiply the first two, 5/8 x times -5/8x to get the first part. Then you multiply the two 5/8 and -5/8 against y^5 and - y^5 to get the second part. At the end you just multiply y^5 and -y^5 to get -y^10
User Guido Passage
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