\(y_{1}=\sqrt{-x^{2}+8 x+14}\),\(y_2=-\sqrt{-x^{2}+8 x+14}\), \(y_{1}=\sqrt{-x^{2}+77}\),\(y_{2}=-\sqrt{-x^{2}+77}\), \(x \approx-2.83, x \approx 0.01, x \approx 2.82, x \approx 4.01, x \approx 7.00\)...\(y_{1}=\sqrt{-x^{2}+8 x+14}\),\(y_2=-\sqrt{-x^{2}+8 x+14}\), \(y_{1}=\sqrt{-x^{2}+77}\),\(y_{2}=-\sqrt{-x^{2}+77}\), \(x \approx-2.83, x \approx 0.01, x \approx 2.82, x \approx 4.01, x \approx 7.00\) \(x \approx-0.578, x \approx 1.187, x \approx 4.388\) \(x \approx 1.61, x=2, x \approx 6.91\) \(x \approx-4.00, x \approx 2.22, x \approx 2.28\) \(x^3+x^2=x^4-x^2+x\) \(x \approx-1.764, x \approx-0.416, x \approx 0.681\) \(x \approx-1.247, x=0, x \approx 0.445, x \approx 1.802\)
