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Question
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
25ax2 – 25a
Sum
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Solution
We have,
25ax2 – 25a = 25a(x2 – 12)
= 25a(x – 1)(x + 1)
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 235]
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