求解 x 的值 (复数求解)
x=-\sqrt{9-s}
x=\sqrt{9-s}\text{, }r=s\text{ and }n=s\text{ and }l=s\text{ and }o=s\text{ and }k=s\text{ and }m=s\text{ and }p=s\text{ and }x_{1}=x_{2}^{2}\text{ and }q=s
求解 x 的值
x=\sqrt{9-s}
x=-\sqrt{9-s}\text{, }s\leq 9\text{ and }r=s\text{ and }n=s\text{ and }l=s\text{ and }o=s\text{ and }k=s\text{ and }m=s\text{ and }p=s\text{ and }x_{1}=x_{2}^{2}\text{ and }q=s
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