The attached aoi.sh does the job, thank you :)
AoI does not start with OpenJDK 17
2 changes needed to make dxf2gcode work on devuan / debian testing
You are right, one can take the solver by it's hand and make it solve the equations, but that is not the point: The solver fails at this simple problem. How should the user trust the solver to work correctly, when it can not solve a perfectly solvable problem? It's a pitty, but in my case it disqualifies maxima for use in classes. My old TI-92 solves this equations the correct way :)
Did not work out so well. Afterupgrading ti the latest supported version I get reliably this result: (%i9) eq1:x²+y²=r²$ eq2:(x-a)²+(y+b)²=d²$ solve([eq1,eq2],[x,y]); (%o9) [] This happens on maxima 5.38.1-8+b1 (devuan) and 5.41.0 (FreeBSD).
Ok, found it: I have here these versions from the debian repository: maxima 5.38.1-8+b1 wxmaxima 16.04.2-1 "maxima" gives the correct result, just like you quoted. "wxmaxima" gives the incorrect result. So this is a bug in wxmaxima, not maxima.
quadratic equatin not solved