1. ## Need to use the quadratic formula?

I'm teaching reaction equilibrium next week, and most of my students have a lot of trouble with the quadratic formula, so I figured I'd download a calculator. Oddly enough, I didn't find a quick (and small, for PDAs) excell-based calculator, so I wrote one.

If you ever need to calculate roots of quadratic polynomials, feel free to steal it:

BTW: I did find a web-based one here

also, if you want to modify it or integrate it...the password is...oh figure it out...or email me

2. if they don't know how to do that on their own, smack them.

3. Originally posted by revil
if they don't know how to do that on their own, smack them.
A teacher's dream...

YOU WILL LEARN OR ELSE!

4. When I was in high school (in Algebra II, 10th grade), me and a couple of my friends were outfitted with TI-86's. The athletes dubbed us "Calculator Corner" because we always had them out while the teacher was "teaching". When we weren't playing Tetris or Breakout or some other game, we would flip over to the next lesson in our book and program the formulas into our calculators so we only had to plug in the variables and let it solve the thing for us. I sure did hate that teacher when we didn't get to use the calculators on one of the tests...

But yeah, they should be able to do it themselves.

-b +- (sqrt (b^2 - 4ac))
------------------------
2a

5. I remember having to derive the quadratic formula when I was in 10th grade algebra.

6. Originally posted by jermscentral
When I was in high school (in Algebra II, 10th grade), me and a couple of my friends were outfitted with TI-86's. The athletes dubbed us "Calculator Corner" because we always had them out while the teacher was "teaching". When we weren't playing Tetris or Breakout or some other game, we would flip over to the next lesson in our book and program the formulas into our calculators so we only had to plug in the variables and let it solve the thing for us. I sure did hate that teacher when we didn't get to use the calculators on one of the tests...

But yeah, they should be able to do it themselves.

-b +- (sqrt (b^2 - 4ac))
------------------------
2a

so i see you were an uber popular kid

7. Originally posted by Burzhui
so i see you were an unter popular kid

8. Hey, when it came test time, I was definitely the popular one with my awesomely cool TI link cable. Yeah. Um, I'm... going.. over ... here... now.

But yeah, I was the computer nerd in high school that everyone came to for help... and I still feel that way. Maybe that's why I post here...

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