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प्रश्न
Factorise the following expression.
4x2 − 25y2
उत्तर
4x2 − 25y2
= (2x)2 − (5y)2
= (2x + 5y) (2x − 5y) ...[∵ a2 − b2 = (a + b) (a − b)]
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