टू ए स्क्वायर माइनस 4 ए बी प्लस टू बी स्क्वेयर
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Given that, 2a²-4ab+2b²
=>2a²-4ab+2b²= 2(a²-2ab+b²)
=> =2{(a-b)²} [ as (a-b)²=a²-2ab+b²
=> =2(a-b)(a-b)
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