subtract - x² + 2xy + y² from x² - 2xy + y2
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Answer:
2x² - 4xy
2x(x - 2y)
Step-by-step explanation:
x² - 2xy + y² - (-x² + 2xy + y²)
x² - 2xy + y² + x² - 2xy - y²
2x² - 4xy
2x(x - 2y)
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