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x² - 10x² - 3xy - 2xy + 5y² - y²
- 11x² - xy + 4y²
b) 5xy (x² + 2xy - y²) - 3y (x³ - x²y + xy²)
5 x³y + 7x²y² - 5y² - 3yx³ + 3y²x² + 3y³
gitu mungkin. :)
x² - 10x² - 3xy - 2xy + 5y² - y²
-9x² - 5xy + 4y²
b. 5xy(x² + 2xy - y²) - 3y(x³ - x²y + xy²)
5x³y + 10x²y² - 5xy³ - 3x³y - 3x²y² - 3xy³
5x³y - 3x³y + 10x²y² - 3x²y - 5xy³ - 3xy³
2x³y + 7x²y² - 8xy³