Question

simplify
1.${x}^{2} (2x - 3y) {y}^{2} - 3x - 2y) - xy(4x - 5y)$
2.$a(a-b)+b(a-c)+c(b-c)$
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Answer 1

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.