Question

(-4/9)X^4-(8/3)X^3-18X^2-72X-76=0 怎么解

Answer 1

你会使用MATLAB吗？
这个用迭代方法或用MATLAB求
b=solve('(-4/9)*x^4-(8/3)*x^3-18*x^2-72*x-76=0')

b =

-1.5597621270378537725262282416841
-3.5914459574682842673654085564489
5.508700655157294017034975207302863534789016327219539103791091937*i - 0.42439595774693098005418160093349
- 5.5087006551572940170349752073029*i - 0.42439595774693098005418160093349
化简后
ans= -783/502

ans =

-2435/678

ans =

-1089/2566 + 1267/230i

ans =

-1089/2566 - 1267/230i