Find the value of (√7 + √5)(√7 - √5).
Show answer & explanation
Correct answer: B
Explanation
Given:
(√7 + √5)(√7 − √5)
By the formula:
(a + b)(a − b) = a² − b²
(√7)² − (√5)²
= 7 − 5
= 2
SSC CHSL 2025 PYQ — Question 51
SSC CHSL - 20 Nov 2025 - Shift 2 • Quantitative Aptitude • Q51