Python解二元二次方程组

from sympy import *
a,b=0,0
n = Symbol('n')
k=  Symbol('k')


with open("ab.txt") as f:
    for line in f.readlines():
        ab=line.split('\t')
        line = line.strip('\n')
        a=eval(ab[0])
        b=eval(ab[1])
        solved_value = solve([n ** 2 - k ** 2 - a, 2 * n * k - b], [n, k])
        print("a value is {}, b value is {} answer is {}".format(a,b,solved_value))


print("Program done!")

其中方程组是n ** 2 - k ** 2 - a = 0和2 * n * k - b = 0。ab.txt文件内容格式如下，中间是制表符分割。

-472.441 69.17
-516.871 83.004
-604.484 83.004
等等

 

参考文章：

https://blog.csdn.net/weixin_36474809/article/details/104476870