Expand: (3x - 7)² = ?
Show answer & explanation
Correct answer: B
Explanation
(3x − 7)²
(a − b)² = a² − 2ab + b²
(3x − 7)² = (3x)² − 2(3x)(7) + 7²
= 9x² − 42x + 49
SSC CPO 2025 PYQ — Question 108
SSC CPO - 9 Dec 2025 - Shift 1 • Quantitative Aptitude • Q108