nostr:npub1zdp33shl69xr0uq3x8n5gsjykq9upycwh6nqm02c3f6x0frrn0dq42vqv8 I feel like some of this I had explained and some I had to reason out myself. 

I definitely had to sit there with a number line and convince myself that "a negative times a positive makes a negative" "works" by going "ok, multiplying is adding repeatedly, when you add a negative, you subtract, so 2x-3… start at zero, subtract 3, subtract 3 again…and you get -6. ok" and then the joy of negative times negative equals positive after that