20<sup>2</sup>⁄<sub>9</sub>H2O
H<sub>2</sub>O105
10<sup>5</sup>2⁄9
<sup>2</sup>⁄<sub>9</sub>√
∛
√2⁄9
√<sup>2</sup>⁄<sub>9</sub>$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$(\frac{36}{12})
\(X=6\frac{36}{12}\)(X=6\frac{36}{12})
\(X=6\frac{3×6}{5×12}\)(X=6\frac{3×6}{5×12})
\(x=\frac{6×36}{12}\)(x=\frac{6×36}{12})
\(20\frac{5}{5}\)(20\frac{5}{5})
\(\frac{a^{2}+c^{2}}{b^{2}+d^{2}}\)(\frac{a^{2}+c^{2}}{b^{2}+d^{2}})
