## Proof of the Quadratic Formula

Posted Feb23-10 at 08:08 PM by jhae2.718 (Divergent Thoughts)
Updated May19-11 at 06:07 PM by jhae2.718

I was reading the Library article on quadratic equations--I'm not sure why--and noticed that a proof of the quadratic formula is not offered. Here is a proof that depresses the quadratic into an equation of the form ax2=b, where a and b are some arbitrary constants.

For the general quadratic equation ax2+bx+c=0:

Let $$x=y-\frac{b}{2a}$$
$$a \left(y-\frac{b}{2a} \right)^2 +b\left(y-\frac{b}{2a}\right)+c=0$$
Expand $$\left(y-\frac{b}{2a}\right)^2$$...
Aerospace Dynamicist
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## Mathtype=The awesomeness

Posted Feb20-10 at 02:02 PM by Pinu7

I just upgraded from Mathtype 5.0 to Mathtype 6.6 . I looked that the translator option and I see "Physics Forum."

With Mathtype:
${e^{ix}} = \cos x + i\sin x$

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## idols(?)

Posted Feb20-10 at 10:03 AM by chhitiz

why do we idolize moviestars, sportstars, and celebrities? and why do we go to any lengths to defend them in heated arguments, appreciate their slightest gestures, find class and style in their smallest movements, go around dishing amazing facts about them, try to know the minutest details of their life, well practically worship them? it probably is our subconscious acceptance of the fact that they have, in a particular field, achieved a level which we can only dream of. i repeat.our fanaticism...
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## i umm

Posted Feb19-10 at 08:06 PM by phantomopera

Well then.....ummmm
never had a blog about physics..never had a blog AT ALL!!!! so hi, i like food and i like science-ALOT
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