subtract 2x²-9xy²-4x+3 from 5xy-6x²+7×-9
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Answer:
5xy - 8x² + 9xy² + 11x -12
Step-by-step explanation:
( 5xy - 6x² + 7x - 9 ) - ( 2x² - 9xy² - 4x + 3 )
⇒ 5xy - 6x² + 7x - 9 - 2x² + 9xy² + 4x - 3
⇒ 5xy - 8x² + 9xy² + 11x -12
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