Tedious, yet routine, calculation.

Have you tried cross eyed stereo-opsis with these?

Needless to say, both the algebra and the calculus fact have to do the the change in volume of an n-dimensional (hyper)-cube.
The produce rule works the same way, but gaining intiution about these hyper volumes is tricky.

Try completing the square
A(x^2 + B/A x) +C= A[ (x+B/(2A))^2 - B^2/4A^2] + C
= A(x+B/(2A))^2 -[ (B^2 -4AC)/4A]=0
(x+B/(2A))^2= [B^2 - 4AC]/ (4A^2)
x =[ -B \pm \sqrt[B^2-4AC]] / 2A

I'm very happy that you sent it to me! I get a lot of useful information from your posts. Please continue doing so.

Thanks for this. Unfortunately, this was a problem upon which I was working. But I am happy that Inoue solved it.

Thank you very much for writing these. The Taxicab article was charming. It's the only one I have taken the time to read so far.

Now you can shout, "I'm a fig plucker. I pluck figs. I'm the best fig plucker who every plucked figs," as quickly as possible.

Consider the metaphor/clique "bird's-eye view." Birds in the morning seem to be scooping insects and spiders from the air that are too tiny for human eyes to see. But do birds see fine details that we don't? Think of a hawk hunting her prey.
I am very grateful for another gentle introduction!

Polo

One can show: Somebody told me this. Or maybe there is somebody who can do this. In the best case, it took me several weeks and a large number of mistakes to be able to do this.

A well-known mathematical fact is like a famous mathematician. Both are oxymoronic. Emphasis on "moron."

*here

Pretty much anything by Sly and the Family Stone and/or War. But just for the season, "Hot Fun in the Summer Time" (former)
"Summertime is Hear" (latter). Still don't neglect either repetoire. HAPPY BIRTHDAY!

Hair there and underwear