I was helping my nephew with his algebra homework last night, and we got stuck on a problem about factoring polynomials. I used to be decent at this, but I completely blanked on how to approach it when there was a negative leading coefficient. I tried explaining it a few ways, but I just felt like I was fumbling. Has anyone else hit a wall on something they thought they knew?
In algebra this kind of thing pops up with a negative leading coefficient I usually mess around by taking out a minus and seeing what the rest looks like.
Hitting a wall with something you thought you knew can feel silly but maybe the problem is not the technique but whether it actually factors nicely. Is it possible this one just doesn't factor nicely?
ugh I get that it happens in algebra when the negative lead hides the patterns.
A practical approach is to look for two numbers that multiply to ac and add to b, then split the middle term and group. This helps factoring in algebra when the lead is negative.
I once messed up a quadratic with a negative lead and forgot to check for a common factor, so I burned time while trying to force it. Factoring reminded me to test all the easy moves first.
If you want we can go through a specific problem you were stuck on and try a couple of angles together?