So I'm a parent, my 14 yo just brought this to me. I last did math in the late 80s (86 - 89 high school) and went all the way to calc I before i stopped math. Was this taught back then? I remember the first two completely, remember FOIL, remember the and then the quadratic formula that was x= the -b +/- stuff. However when I looked at this vertex form it looked like nothing I've seen before. When was it introduced in US math? Where was it hiding in the 80s? I'm really curious as I don't even remember my now 22 yo doing this (older sibling) or my 20 yo kids doing it.
I'm 26 having to re-learn high school math from scratch because my old teachers just told us to memorize formulas like they're magical incantations instead of explaining or visualizing why they even made sense, so I inevitably forgot all of it as soon as those classes were over. These videos are way more effective, i almost think teachers should just put these on for their class instead of trying to teach their own way
Thank you so much for this explanation! It really helps to understand WHY the x-component is the negative of "h." It's always better to understand than to just memorize.
how i understood it, by having the vertex version of a quadratic formula, you dont need to find the derivative of the function to find the break point and you can immidiatelly find the extremum of the function
