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Question

Solve the following equation.
x2y22x+y2=0,2x24x+3+y3=0.

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Solution

The given system of equations is equivalent to y2=2x/(1+x2),2(x1)2+1+y3=0.
Since 2x/(1+x2)1 for all real x, it follows from the first of these equations that y21 or 1y1.
Again from the second equation of the system, we get
y3=12(x1)21
Now since y1 and y1, we must have y=1
Then x=1. This the solution is x=1, y=1.

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