मान ज्ञात कीजिए(a+b)²+(a-b)²
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( a + b )² + ( a - b )²
a² + b² + 2ab + ( a² + b² - 2ab )
a² + b² + 2ab + a² + b² - 2ab
( Cαncєl símílαr tєrms )
a² + b² + a² + b²
2 a² + 2 b²
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