dsgrue3 on 30 April 2013
x = 2
x^2 = 4
x = +/- 2
Fuzzy math is fuzzy. This is why it doesn't sit well with me.
I understand it through Pezus' example with fractions, but this isn't an equation. It's just an assertion.
It isn't a proof at all.
Surely you admit -2 != 2?







