零點計算器

該計算器將嘗試在給定的區間上求出線性、二次、三次、四次、多項式、有理、無理、指數、對數、三角、雙曲以及絕對值函數的零點（精確與數值，實根與複根）。

Enter an equation:

Like x^2+3x+4=0 or sin(x)=x.

Find the solution with respect to:

Enter an interval: ,

Leave empty, if you don't have any restrictions.

Only real roots

Only real roots will be searched for if you specify the interval, regardless of whether the box is checked.

If the calculator did not compute something or you have identified an error, or you have a suggestion/feedback, please contact us.

Your input: solve the equation $$$x^{4} - 16 x^{3} + 90 x^{2} - 224 x + 245=0$$$ for $$$x$$$ on the interval $$$\left( -\infty,\infty \right )$$$

$$$x=5$$$

$$$x=7$$$

$$$x=2 + \sqrt{3} i\approx 2.0 + 1.73205080756888 i$$$

$$$x=2 - \sqrt{3} i\approx 2.0 - 1.73205080756888 i$$$

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逐步求解函數的零點