(x+y)square-(x-y) square.
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Answer:
4xy
Step-by-step explanation:
(x+y)²-(x-y)²
x² + 2xy + y² - (x² - 2xy + y²)
x² + 2xy + y² - x² + 2xy - y²
Cancelling out like terms,
2xy + 2xy
4xy
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