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यदि `x^(2)+y^(2)+6x+5=4(x-y)` हो तो `x-y` क्या होगा?A. 1B. -1C. 0D. 4 |
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Answer» Correct Answer - A `x^(2)+y^(2) +6x+5=4(x-y)` `x^(2)+y^(2)+6x+5-4x+4y=0` `x^(2)+2x+1+y^(2)+4y+4=0` `x^(2)+2x+1+y^(2)+4y+4=0` `(x+1)^(2)+(y+2)^(2)=0` `0 , 0` `x+1=0` `x=-1` `y+2=0` `y=-2` `(x-y=-1-(-2)=-1+2=1` |
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