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प्रश्न
Subtract: 5a2 - 7ab + 5b2 from 3ab - 2a2 -2b2
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उत्तर
(3ab - 2a2 - 2b2) - (5a2 - 7ab + 5b2)
= 3ab - 2a2 - 2b2 - 5a2 + 7ab - 5 b2
= 3ab + 7ab - 2a2 - 5a2 − 2b2 - 5 b2
= 10ab - 7a2 - 7b2
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