Solver Giving Nothing

[parisse]

The CAS solver works with exact coefficients, since you have approx coefficients it will try to convert them to exact coefficients, and this fails because 127e-12 is small and is converted to 0. The solution is to write exact coefficients yourself:

Code:

s:=solve([127*10^-12=(a*b)/(a+b) , 8377*10^-3=((a+b)/b)^2],[a,b])

and approx after:

Code:

evalf(s)