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SSC CGL 2023 PYQ — Question 71

SSC CGL - 21 July 2023 - Shift 4 • Quantitative Aptitude • Q71

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If (a - b) = 1, then what is the value of (a³ - b³)?

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Correct answer: A

Explanation

The correct answer is option 1 i.e. a2 + ab + b²

Given that

(a - b) = 1

Also,

a3 - b3 = (a - b)(a2 + ab + b²)

a3 - b3 = 1((a2 + ab + b²)) = (a2 + ab + b²)