engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Algebra Identities
If (7x - 3)3 + (x + 2)3 + 27(2x + 5)3 = 9(7x - 3) (x + 2) (2x + 5), then (9x + 13) : (5x + 7) = ?
1
35 : 19
2
5 : 3
3
2 : 1
4
11 : 6