Quadratic.swift Calculator program

[Jackyboi1215]

// I created this program for people so they may use the calculator to help with their math homework! // I am new to swift but got my certificate in c++ already!

[CLAassistant]

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5 out of 7 committers have signed the CLA.

:white_check_mark: adistasicc
:white_check_mark: LinKCoding
:white_check_mark: SSJASIAN
:white_check_mark: jekhi5
:white_check_mark: sonnynomnom
:x: galinap684
:x: CATower
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