5. Subtract 5xy - 3x - 2y2 - 4 from 6x2 - 4xy +9y2 + 5.
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Answer:
3x² + 11y² + xy + 9
Step-by-step explanation:
==: 6x² + 9y² - 4xy + 5 - (3x² - 2y² - 5xy - 4)
==: 6x² + 9y² - 4xy + 5 - 3x² + 2y² + 5xy + 4
==: 3x² + 11y² + xy + 9
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