Well, the cubic equation has 2 possible situations
- one real root and two complex roots, e.g. x^3+1=0
- three real roots
- all roots are different
- single solution, all roots are the same
- two distinctive solutions, one root is different and two roots are the same (the equation has two roots)
e.g. your equation has two roots, x1=-2 and x2=x3=2
Your calc has QR code button (shift + optn). If you have android powered phone or tablet with camera and available internet connection, you can see the graph of your equation.
You need only this app
Edited by pan.gejt, 13 February 2017 - 11:07 AM.