एक्स स्क्वायर प्लस 7 एक्स वाई माइनस वाई टू मल्टीप्लाई बाय एक्स प्लस वाई
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Answer:
x²+7xy- y²(x+y)
=x³+x²y +7x²y+ 7xy²-y²x-y³
=x³+8x²y + 6xy²-y³
Step-by-step explanation:
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