Quadratic Formula and Functions
If you want to work with quadratic-like equations, go ask Paul for help. He knows what is what, where is where, and how to do the voodoo that you need to do.
Imaginary numbers can take some getting used to. You have to unlearn a rule that's been drilled into your head (don't bother looking; the hole has already healed) and the exponents cycle in a way real numbers don't. This page provides some more help in wrapping your head around all these new ideas.
Do you want someone else to explain the quadratic formula and the discriminate to you? What did we not do a good enough job for you? Oh fine, here you go. We could never stay mad at you.
Follow along as Patrick completes the square in real time. It turns out the square was missing a block-shaped piece this whole time, not this L-shaped piece we've been holding onto.
There are three main methods for solving the quads—that is, quadratic equations—and this song covers them all. If you need help working on your glutes, you'll need a different rap.
Let no inequality stand unexamined. Follow this video's advice to learn more about the struggles for quadratic social justice.
A terrifying video of a soccer ball repeatedly cloning itself in mid-air, using anti-gravity to suspend its progeny in place. They line up to form a series of parabolas, which is pretty cool looking we must admit.
Games and Tools
Insert numbers, get a parabola. Pull sliders, change the parabola. See the function, learn the function, love the function.
A caveman is going to be eaten by dinosaurs unless you can correctly answer questions about parabolas. There has to be a reason that this makes sense, but we can't think of it.
This site will solve a quadratic equation given in the standard form. It works great for double-checking your answers (after double checking them by hand, of course), but not-so-great for doing your homework for you. It's also nearly impossible to use on a test, too. You should know by now how you should and should not use this kind of thing, so don't make us regret giving it to you.