simplify
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2.
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Answer:
I think your 1st & 2nd question there is a small mistake.
1. x²(2x-3y)-y²(3x-2y)-xy(4x-5y)
2x³-3x²y-3xy²+2y³-4x²y+5xy².
2x³+2y³-3x²y-4x²y-3xy²+5xy².
2x³+2y³-7x²y+2xy².
2. a(b-c)+b(c-a)+c(a-b).
ab-ac+bc-ba+ca-cb.
ab-ba+bc-cb-ac+ca.
0.
I think this is your answer.
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