Solve for x_1, x_2, x
x=0\text{, }x_{1}=\sqrt{2}\approx 1.414213562\text{, }x_{2}=-\sqrt{2}\approx -1.414213562
x=\frac{7}{5}=1.4\text{, }x_{1}=\sqrt{2}\approx 1.414213562\text{, }x_{2}=-\sqrt{2}\approx -1.414213562
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