11. सरल कीजिए : (685+4.16) + (68.5-...
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11. सरल कीजिए : (685+4.16) + (68.5-4.16) 685x685+4.16x4.16 (1) 1 (2) 2 (3) 1125 (4) 685

11th - 12th Class
Maths
Solution
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11. (2) ( frac{(685+4.16)^{2}+(68.5-4.16)^{2}}{68.5 times 68.5+4.16 times 4.16} ) माना ( 68.5=a ) तथा ( 4.16=b ) ( therefore ) व्यजंक ( =frac{(a+b)^{2}+(a-b)^{2}}{a^{2}+b^{2}} ) ( =frac{a^{2}+b^{2}+2 a b+a^{2}+b^{2}-2 a b}{a^{2}+b^{2}} ) ( =frac{2left(a^{2}+b^{2}right)}{left(a^{2}+b^{2}right)}=2 )
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