from the sum of x²-y²-xy and 3x²-2y²+7 subtract 2x²+2y²+7x²y-3xy².
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Answer:
2x² - 5y² - 7x²y + 3xy² - xy + 7
Step-by-step explanation:
( x² - y² - xy ) + ( 3x² - 2y² + 7 ) - ( 2x² + 2y² + 7x²y - 3xy² )
x² - y² - xy + 3x² - 2y² + 7 - 2x² - 2y² - 7x²y + 3xy²
x² + 3x² - 2x² - y² - 2y² - 2y² - 7x²y + 3xy² - xy + 7
4x² - 2x² - 3y² - 2y² - 7x²y + 3xy² - xy + 7
2x² - 5y² - 7x²y + 3xy² - xy + 7
HOPE THIS WILL HELP YOU!
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