engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Quantitative Aptitude Algebra Identities

 यदि a2 + b2 + c2 + 12 = 4 (a +b + c) है, तब 2a + 3b + 4c का मान क्या है?

1
18
2
16
3
-18
4
9
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