Difference of Squares

Oh, good people, yes indeed. Learn your positives and negatives. And for heavens sake, teach your infants that (a+b) (a-B) = a^2 + b^2. Just do it.

(Today the math class I'm visiting is reviewing for the test. SIgns and conjugates are messin folks up. Welp, that and that it would seem people didn't do a whole lot of practice over the weekend to have actually done it, so lots of 'em were doing the problems cold.

Spelling observations coming.