Да се реши в реални числа системата:
[tex]\begin{cases}\sqrt{1+(x+y)^{2}}=-y^{6}+2x^{2}y^{3}+4x^{4}\\ \sqrt{2x^{2}y^{2}-x^{4}y^{4}}\geq 4x^{2}y^{3}+5x^{3}\end{cases}[/tex]
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