railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Algebra Identities

खालील अभिव्यक्ती सोपी करा.

49a 2 + 70ab + 25b 2

1
(5a + 7b) 2
2
(5a - 7b) 2
3
(7a - 5b) 2
4
(7a + 5b) 2
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