What is (9x - 5)²?
Show answer & explanation
Correct answer: D
Explanation
(9x − 5)²
(a − b)² = a² − 2ab + b²
= (9x)² − 2×9x×5 + 5²
= 81x² − 90x + 25
SSC CPO 2025 PYQ — Question 63
SSC CPO - 13 Dec 2025 - Shift 1 • Quantitative Aptitude • Q63
SSC CPO - 13 Dec 2025 - Shift 1 • Quantitative Aptitude • Q63
What is (9x - 5)²?
Correct answer: D
Explanation
(9x − 5)²
(a − b)² = a² − 2ab + b²
= (9x)² − 2×9x×5 + 5²
= 81x² − 90x + 25