Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Algebra Identities
If a + b + c = 0 and a2 + b2 + c2 = 40, then what is the value of 4ab + 4bc + 4ca?
1
-85
2
-40
3
-20
4
More than one of the above.
5
None of the above