railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Number System Quick Math

जर a3 = b3 + 988 आणि a - b = 4, तर 2a2 + 2ab + 2b2 चे मूल्य किती आहे?

1
500
2
516
3
247
4
494
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