What are some interesting ways of proving the quadratic formula?

Boorglar

Without the classic method of "completing the square" and factorising?

Mandlebra

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Boorglar	What are some interesting ways of proving the quadratic formula? Tweet Without the classic method of "completing the square" and factorising?

Mandlebra	http://aleph0.clarku.edu/~djoyce/jav...I/propII6.html try that