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SSC Selection Post 2025 PYQ — Question 45

SSC Selection Post - Higher Secondary Level - 28th July 2025 - Shift 2 • Quantitative Aptitude • Q45

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The expression (x + y + z)² − (x² + y² + z²) is equal to:

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Correct answer: A

Explanation

(x + y + z)² = x² + y² + z² + 2xy + 2yz + 2zx

(x + y + z)² − (x² + y² + z²)

= 2(xy + yz + zx)