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CUET
General Test
Quantitative Reasoning
Algebra
25a2 − 9 is factored as
(5a + 3)(5a − 3)
(5a + 1)(5a − 9)
(5a − 3)2
(25a + 1)(a − 9)
We know,
(a2 – b2) = (a – b)(a + b)
Given = 25a2 – 9
= (5a)2 – 32
= (5a – 3) (5a + 3)
