Issolvi x^3+2x^2+x=7

$$x ^ { 3 } + 2 x ^ { 2 } + x = 7$$

Solvi għal x (complex solution)

$$x=-\frac{2^{\frac{2}{3}}\left(1+\sqrt{3}i\right)\left(-\sqrt[3]{3\left(9\sqrt{1351}+191\sqrt{3}\right)}i-2\sqrt{3}\sqrt[3]{2}i-\sqrt[3]{3\sqrt{4053}+191}+2\sqrt[3]{191-3\sqrt{4053}}+2\sqrt[3]{2}\right)}{24}\approx -1.655426082+1.612328195i$$

$$x = \frac{2 ^ {\frac{2}{3}} {(\sqrt[3]{3 \sqrt{4053} + 191} + \sqrt[3]{191 - 3 \sqrt{4053}} - 2 \sqrt[3]{2})}}{6} \approx 1.310852163$$

$$x=-\frac{2^{\frac{2}{3}}\left(-\sqrt{3}i+1\right)\left(-\sqrt[3]{3\sqrt{4053}+191}+2\sqrt[3]{191-3\sqrt{4053}}+2\sqrt[3]{2}+\sqrt[3]{3\left(9\sqrt{1351}+191\sqrt{3}\right)}i+2\sqrt{3}\sqrt[3]{2}i\right)}{24}\approx -1.655426082-1.612328195i$$

Solvi għal x

$$x = \frac{2 ^ {\frac{2}{3}} {(\sqrt[3]{3 \sqrt{4053} + 191} + \sqrt[3]{191 - 3 \sqrt{4053}} - 2 \sqrt[3]{2})}}{6} \approx 1.310852163$$