So, I was given the task of proving the quadratic formula for homework... I think I've pretty much got it, but I'd like to be sure, so if someone can look over my working it'd be much appreciated.

Completing the square gives;

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- Feb 14th 2010, 06:58 AM #1
## Can someone look this over please?

So, I was given the task of proving the quadratic formula for homework... I think I've pretty much got it, but I'd like to be sure, so if someone can look over my working it'd be much appreciated.

Completing the square gives;

- Feb 14th 2010, 07:01 AM #2

- Feb 14th 2010, 07:10 AM #3

- Feb 14th 2010, 07:49 AM #4