engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Algebra Identities
If 2x2 + 5x - 1 = 0, then what is the value of x3 - \(\frac{1}{{8{x^3}}}\)?
1
-\(\frac{155}{8}\)
2
-\(\frac{125}{8}\)
3
\(\frac{145}{4}\)
4
\(\frac{125}{8}\)