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प्रश्न
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
4x2 – 49y2
योग
उत्तर
We have,
4x2 – 49y2 = (2x)2 – (7y)2
= (2x – 7y)(2x + 7y)
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अध्याय 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३५]
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