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Q: Write the expanded form of (6a + 2b + 7c)² (6a + 2b + 7c)² को विस्तारिक रूप में लिखिए।
  • A. 6a²+ 4b² + 49c² + 28ab + 28bc + 84ac
  • B. 36a² + 4b² + 49c² + 24ab + 28bc + 94ac
  • C. 36a² + 4b² + 49c²+ 24ab + 23bc + 84ac
  • D. 36a² + 4b² + 49c² + 24ab + 28bc + 84ac
Correct Answer: Option D - प्रश्नानुसार (a+b+c)² = a²+b²+c²+2ab+2bc+2ca (6a + 2b + 7c)² = (6a)²+(2b)²+(7c)²+2×6a×2b+2×2b×7c+2×7c×6a = 36a² + 4b² + 49c² + 24ab + 28bc + 84ac
D. प्रश्नानुसार (a+b+c)² = a²+b²+c²+2ab+2bc+2ca (6a + 2b + 7c)² = (6a)²+(2b)²+(7c)²+2×6a×2b+2×2b×7c+2×7c×6a = 36a² + 4b² + 49c² + 24ab + 28bc + 84ac

Explanations:

प्रश्नानुसार (a+b+c)² = a²+b²+c²+2ab+2bc+2ca (6a + 2b + 7c)² = (6a)²+(2b)²+(7c)²+2×6a×2b+2×2b×7c+2×7c×6a = 36a² + 4b² + 49c² + 24ab + 28bc + 84ac