iSolve : For A,B,C reals

Method :

Let

Choose ,

rewrite this as –

which again is re-written as –

Where ,

Therefore, and are the roots of the equation –

Therefore ,

Now we have that –

Solving the quadratic plus the trivial solution gives us –

now substituting the value of y in we get the three very simple roos (:D)

I know.. the calculations are extremely annoying…… perhaps that is why this is used very less…

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