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Q: Write the expanded form of (5a + 4b + 9c) ² (5a + 4b + 9c) ² को विस्तारित रूप में लिखिए।
  • A. 25a² + 16b² + 81c² + 44ab + 72bc + 90ac
  • B. 25a² + 16b² + 81c² + 40ab + 72bc + 90ac
  • C. 25a² + 16b² + 81c² + 40ab + 72bc + 100ac
  • D. 25a² + 16b² + 81c² + 40ab + 67bc + 90ac
Correct Answer: Option B - : दिया है- (5a + 4b + 9c)² (a+b+c)² = a²+b²+c²+2ab+2bc+2caसे, = (5a)²+(4b)²+(9c)²+2×5a×4b+2×4b×9c+2×9c×5a =25a²+16b²+81c²+40ab+72bc+90ac
B. : दिया है- (5a + 4b + 9c)² (a+b+c)² = a²+b²+c²+2ab+2bc+2caसे, = (5a)²+(4b)²+(9c)²+2×5a×4b+2×4b×9c+2×9c×5a =25a²+16b²+81c²+40ab+72bc+90ac

Explanations:

: दिया है- (5a + 4b + 9c)² (a+b+c)² = a²+b²+c²+2ab+2bc+2caसे, = (5a)²+(4b)²+(9c)²+2×5a×4b+2×4b×9c+2×9c×5a =25a²+16b²+81c²+40ab+72bc+90ac