Mathematics · Algebraic Identities
यदि a + b + c = 0 और a2 + b2 + c2 = 40 है, तो 4ab + 4bc + 4ca का मान क्या है?
- 1-160
- 2-20
- 3-40
- 4-80✓
सही उत्तर देखें
-80
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