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प्रश्न
Use the formula to find the value.
97 × 103
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उत्तर
It is known that, (a + b) (a − b) = a2 − b2.
97 × 103
= (100 − 3) × (100 + 3)
= (100)2 − (3)2
= 10000 − 9
= 9991
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