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SSC CHSL 2023 PYQ — Question 68

SSC CHSL - 11 Aug 2023 - Shift 4 • Quantitative Aptitude • Q68

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If a - b = 9 and ab = 20, then a2 + b2:

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Correct answer: C

Explanation

The correct answer is option 3 i.e. 121.

a2 + b2 = (a - b)2 + 2ab

= (9)2 + 2(20)

= 81 + 40

= 121

Hence, the required value is 121.