second-degree linear system

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Francesco Gregorini
编辑： ANKUR KUMAR 2018-9-28
I want to solve a second-degree linear system, but I can not find anything. Want to resolve a system like this: {x^(2)−xy = y^(2)+1 ; 12x+4+y=0 is there any Matlab function that solves this type of system? I could have an example of a code?

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KALYAN ACHARJYA
KALYAN ACHARJYA 2018-9-28
编辑：KALYAN ACHARJYA 2018-9-28
syms x y
[solx,soly]=solve(x^2-x*y-y^2-1==0, 12*x+4+y==0)

更多回答（1 个）

ANKUR KUMAR
ANKUR KUMAR 2018-9-28
编辑：ANKUR KUMAR 2018-9-28
ly make all equation equal to 0. Write this in a function and save this as as first.m
function F = first(x)
F(1)=(x(1)^2)-(x(1)*x(2))-(x(2)^2)-1;
F(2)=12*x(1)+4+x(2);
end
Now type this in command window
fun = @first;
x0 = [0,0];
x = fsolve(fun,x0)
Type this to get the iterated result.
options = optimoptions('fsolve','Display','iter');
[x,fval] = fsolve(@first,x0,options)

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