求解 {l}{a^2=4+6}{9/a^2+2/b^2=1}

$$\left. \begin{array} { l } { a ^ { 2 } = 4 + 6 } \\ { \frac { 9 } { a ^ { 2 } } + \frac { 2 } { b ^ { 2 } } = 1 } \end{array} \right.$$

求解 a, b 的值

$$a=-\sqrt{10}\approx -3.16227766\text{, }b=-2\sqrt{5}\approx -4.472135955$$

$$a=-\sqrt{10}\approx -3.16227766\text{, }b=2\sqrt{5}\approx 4.472135955$$

$$a=\sqrt{10}\approx 3.16227766\text{, }b=-2\sqrt{5}\approx -4.472135955$$

$$a=\sqrt{10}\approx 3.16227766\text{, }b=2\sqrt{5}\approx 4.472135955$$