(3 + √2)² − (3 − √2)² − 12√2 = ?
Show answer & explanation
Correct answer: A
Explanation
Given:
(3 + √2)² − (3 − √2)² − 12√2
By the formula:
(a + b)² − (a − b)² = 4ab
= 4 × 3 × √2 − 12√2
= 12√2 − 12√2
= 0
SSC MTS - 18 Feb 2026 - Shift 2 • Reasoning • Q13
(3 + √2)² − (3 − √2)² − 12√2 = ?
Correct answer: A
Explanation
Given:
(3 + √2)² − (3 − √2)² − 12√2
By the formula:
(a + b)² − (a − b)² = 4ab
= 4 × 3 × √2 − 12√2
= 12√2 − 12√2
= 0