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यदि `x^(2)+y^(2)-4x+8=0` है तो `x-y` का मान क्या होगा?A. 4B. -4C. 0D. 8 |
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Answer» Correct Answer - C `x^(2)+y^(2)-4x-4y+8=0` `x^(2)+4-4x+y^(2)+4-4y=0` `(x-2)^(2)+(y-2)^(2)=0` `x-2=0, y-2=0` `x=2, y=2` `:. x-y=2-2=0` |
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