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Q: Write the expanaded form of (3a + 5b + 7c)² (3a + 5b + 7c)² को विस्तारित रूप में लिखिए।
  • A. 9a² + 25b² + 49c² + 30ab + 70bc + 52ac
  • B. 9a² + 25b² + 49c² + 34ab + 70bc + 42ac
  • C. 9a² + 25b² + 49c² + 30ab + 70bc + 42ac
  • D. 9a² + 36b² + 49c² + 30ab + 65bc + 42ac
Correct Answer: Option C - प्रश्नानुसार, (3a + 5b + 7c)² = (3a)²+(5b)²+(7c)²+2.3a.5b+2.5b.7c+2.7c.3a =9a²+25b²+49c² +30ab+70bc+42ca =9a²+25b²+49c²+30ab+70bc+42ac
C. प्रश्नानुसार, (3a + 5b + 7c)² = (3a)²+(5b)²+(7c)²+2.3a.5b+2.5b.7c+2.7c.3a =9a²+25b²+49c² +30ab+70bc+42ca =9a²+25b²+49c²+30ab+70bc+42ac

Explanations:

प्रश्नानुसार, (3a + 5b + 7c)² = (3a)²+(5b)²+(7c)²+2.3a.5b+2.5b.7c+2.7c.3a =9a²+25b²+49c² +30ab+70bc+42ca =9a²+25b²+49c²+30ab+70bc+42ac