How to solve these easy equations below? (quadratic equation)

C=1*L-(2*L+3);
C=7/(4*5*L^6);

Both C and L are unknown variables. How could I solve these equations? Looking for your answer!

Answer 1

[Image Analyst]

Sounds like homework - is it? I'd set them equal to each other (to eliminate C) then use fzero() to find L, then stick in either equation to find C. Give that a try and come back with MATLAB code if you want any help with it. By the way, I don't see how the quadratic equation applies to this 6th order equation.

Answer 2

[Roger Stafford]

Eliminate C and get the polynomial equation

20*L^7 + 60*L^6 + 7 = 0   (<-- Corrected)

and use 'roots'.