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प्रश्न
Simplify (a2 − b2)2
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उत्तर
(a2 − b2)2 = (a2)2 − 2(a2) (b2) + (b2)2 [(a − b)2 = a2 − 2ab + b2 ]
= a4 − 2a2b2 + b4
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