engineering recuitment Indian Coast Guard Yantrik Mock Test 2024 Quantitative Aptitude Algebra Identities

दिए गए व्यंजक का मान क्या है?

(a + b + c)2 - a2  - b2 - c2

1
2abc
2
2(ab + bc + ca)
3
2(a + b + c)
4
2ab + bc - 2ca
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