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प्रश्न
If a2 + b2 = 41 and ab = 4, find : a – b
बेरीज
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उत्तर
(a − b)2 = a2 + b2 − 2ab
= 41 − 2(4)
= 41 − 8
= 33
∴ a − b = `sqrt33`
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