Please help me to solve two nonlinear algebraic equations

eq1 = b5*L1^2 + (b9 + b7)*L1 + b6*L2^2 + b10*L2 + b8 = 0:
eq2 = b27*L1^4 - b32*L1^3 + b33*L1^2 - b34*L1 ...
      + b28*L2^4 - b35*L2^3 + b36*L2^2 - b37*L2 ...
      + (b39 - b38 + b30 - b29 - b31) = 0:

%Solve the system for L1 and L2
solutions = solve({eq1, eq2}, {L1, L2}):

Answer 1

[Matt J]

syms L1 L2

eq1 = b5*L1^2 + (b9 + b7)*L1 + ...
      b6*L2^2 + b10*L2 + b8 == 0;

eq2 = b27*L1^4 - b32*L1^3 + b33*L1^2 - b34*L1 + ...
      b28*L2^4 - b35*L2^3 + b36*L2^2 - b37*L2 + ...
      (b39 - b38 + b30 - b29 - b31) == 0;

% Solve the system for L1 and L2
solutions = vpasolve([eq1, eq2], [L1, L2])

[Tarek]

please help @Matt J

Attempt to execute SCRIPT sym as a function:

C:\toolbox\symbolic\symbolic\@sym\sym.m

Error in syms (line 227)

defined = sym(zeros(1, length(args)));

Error in Untitled (line 1)

syms L1 L2

[Matt J]

Do you have a script names 'sym' somewhere? You shouldn't.

which -all sym

/MATLAB/toolbox/symbolic/symbolic/@sym/sym.m  % sym constructor

[Tarek]

@Matt J

yes, i don't know to solve this problem??

Are you delet this file??

[Torsten]

@Tarek

What do you get when you type

which -all sym

in the command editor ?

Maybe this answer helps:

https://uk.mathworks.com/matlabcentral/answers/101304-why-do-i-get-the-error-message-attempt-to-execute-script-as-a-function

[Matt J]

Do not delete

/MATLAB/toolbox/symbolic/symbolic/@sym/sym.m

Delete any other scripts named sym.m