Question

急求：matlab解二元二次方程组！！

(x+100)^2+y^2-1.9696xy-196.96y-90000=0
(x-100)^2+y^2-1.4142xy+141.42y-90000=0
用
syms x y;
solve('y^2+(x+100)^2-1.9696xy-196.96y-90000=0','(x-100)^2+y^2-1.4142xy+141.42y-90000=0','x','y')
按回车键怎么提示
Error using ==> solve>getEqns at 202' y^2+(x+100)^2-1.9696xy-196.96y-90000=0 ' is not a valid expression or equation.
Error in ==> solve at 67[eqns,vars] = getEqns(varargin{:});

Answer 1

应该是
1.9696xy中间要乘号：1.9696*x*y

196.96y 1.4142xy 141.42y也是的

追问

谢谢！现在已经改过来了，但出现了这种情况：
syms x y; solve('(x+100)^2+y^2-1.9696*x*y-196.96*y-90000=0','(x-100)^2+y^2-1.4142*x*y+141.42*y-90000=0','x','y')
ans =
x: [4x1 sym]
y: [4x1 sym]
这个x，y值好像不对呀？

追答

用
[x,y]= solve('y^2+(x+100)^2-1.9696*x*y-196.96*y-90000=0','(x-100)^2+y^2-1.4142*x*y+141.42*y-90000=0')

这个试试