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Answer:
2x² + 2y²
Step-by-step explanation:
(x-2y)² + (x+2y)²
According to formula; (a+b)²=a²+2ab+b²
(x²-2xy+y²)+(x²+2xy+y²)
x²-2xy+y²+x²+2xy+y²
x²+y²+x²+y²
2x²+2y²
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