Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Quantitative Aptitude Algebra Identities

যদি a + b + c = 7 এবং a3 + b3 + c3 - 3abc = 175 হয়, তাহলে (ab + bc + ca) এর মান কত?

1
8
2
7
3
6
4
9
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