Question 963405
{{{x^2+4y^2+20x^2-40y+325=0}}}
{{{x^2+20x^2+4y^2-40y+325=0}}}
{{{21x^2+4(y^2-10y)+325=0}}}
{{{21x^2+4(y^2-10y+25)+325=4(25)}}}
{{{21x^2+4(y-5)^2=100-325}}}
{{{21x^2+4(y-5)^2=-225}}}
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It is not a real function.