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Add 8x^2 +7xy -6y^2, 4x^2 -3xy + 2y^2 and -4x^2 +xy -y^2pls answer​

Answer»

Answer:

8x² + 5xy - 5y²

Step-by-step explanation:

(8x² + 7XY - 6y²) + (4x² - 3XY + 2y²) + (- 4x² + XY - y²)

= 8x² + 7xy - 6y² + 4x² - 3xy + 2y² - 4x² + xy - y²

= 8x² + 4x² - 4x² + 7xy - 3xy + xy - 6y² + 2y² - y²

= 8x² + 5xy - 5y²

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