Add a. 5x² - 2xy + 8y² , 3xy - 7y² - 2x² and y² + xy - 4x².
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Answer:
x²+2xy+2y²
Step-by-step explanation:
= 5x² - 2xy + 8y² + 3xy - 7y² - 2x² + y²+xy - 4x²
=5x²-2x²-4x²-2xy+3xy+xy+8y²-7y²+y²
=x²+2xy+2y²
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