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प्रश्न
Use the formula to find the value.
54 × 46
योग
उत्तर
It is known that, (a + b) (a − b) = a2 − b2.
54 × 46
= (50 + 4) × (50 − 4)
= (50)2 − (4)2
= 2500 − 16
= 2484
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