I was doing my math on this calculator when I came to a problem that required me to find *a* and *b* for the setup \(solve(ab=11,a+b=6)\)

I put it in the calculator and I got: {ab=11, a=6-r1, b=r1}.

What is the *r1*, and where is it coming from?

helperid1839321 Nov 4, 2017

#1**+3 **

The calculator doesn’t understand your implicit multiplication, so you need to enter a*b=11, not ab =11. If you do this the calculator produces the correct two (complex) results.

In your case, the calculator simply ignored the ab=11 part and assigned an arbitrary variable, r1, to b and then solved for a as a = 6 - b → 6 - r1.

Alan Nov 5, 2017