软件中心里有没有可以解二次方程的计算器？

Question

我想要一个好的科学计算器，只需输入二次方程就可以计算出任何二次方程的根

首先，有没有类似 ubuntu 软件中心的应用程序？

Answer 1

在 中非常简单octave，只需将方程的系数输入roots函数中即可

octave:1> roots([1,0,-1])
ans =

  -1
   1

参阅在线帮助

octave:2> help roots
 'roots' is a function from the file /usr/share/octave/3.8.1/m/polynomial/roots.m

 -- Function File: roots (V)

     For a vector V with N components, return the roots of the
     polynomial

          v(1) * z^(N-1) + ... + v(N-1) * z + v(N)

     As an example, the following code finds the roots of the quadratic
     polynomial

          p(x) = x^2 - 5.

          c = [1, 0, -5];
          roots (c)
          =>  2.2361
          => -2.2361

     Note that the true result is +/- sqrt(5) which is roughly +/-
     2.2361.

     See also: poly, compan, fzero.

Answer 2

算一下！可能符合您的需求：