聯立方程組計算器

解方程組

此求解器(計算器)將嘗試求解包含 2、3、4、5 條方程的各種類型方程組,包括多項式方程、有理方程、無理方程、指數方程、對數方程、三角方程、雙曲函數方程、絕對值方程等。它既可求實數解,也可求複數解。若要分步求解線性方程組,請使用線性方程組計算器

Enter a system of equations:
Comma-separated, for example, x+2y=5,3x+5y=14.
Solve for (comma-separated):
Leave empty for automatic determination, or specify variables like x,y.

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Your input: solve $$$\begin{cases} x^{2} - 4 x - y + 9=0 \\ y=\frac{21}{4} \end{cases}$$$ for $$$x$$$, $$$y$$$.

Answer

$$$\left(x, y\right)=\left(\frac{3}{2}, \frac{21}{4}\right)= \left(1.5, 5.25\right)$$$

$$$\left(x, y\right)=\left(\frac{5}{2}, \frac{21}{4}\right)= \left(2.5, 5.25\right)$$$


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