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प्रश्न
Use the formula to find the value.
98 × 102
उत्तर
It is known that, (a + b) (a − b) = a2 − b2.
98 × 102
= (100 − 2) × (100 + 2)
= (100)2 − (2)2
= 10000 − 4
= 9996
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