solve equation function added

[kanikaa-3018]

user has to input 3 comma separated values to solve the quadratic equation, else error is thrown

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[kanikaa-3018]

ok ill change it

[kanikaa-3018]

pls check if its fine now

[kanikaa-3018]

i have completed it, pls check now

[kanikaa-3018]

sir the button is on the right side, how shall i move it further? could u pls elaborate

[DhanushNehru]

Looks fine , Thanks for your contribution @kanikaa-3018