“Thus, (A+B)(A-B)=B(A-B)
Therefore, it should be obvious to the casual observer, that A+B=B”
You’d be right if division by zero were permitted. Unfortunately it’s not, QED, you’re wrong.
I meant to be wrong.
Apropos, one of my favorite HS teachers - Rocky, aka MR. Rockwell, aka the math guy - died last week.
He was a vet, a pilot, and a really good influence on my life. Looked at me funny when I enlisted during the Iranian Hostage Crises, but was really supportive.
I kept meaning to go show him my degree in Math - it would have made him laugh.
But I never did.
Sigh.