Originally Posted by spank_fusion
(A + B)(A - B) = B(A - B)
A + B = B
B + B = B
2B = B
2 = 1
And there you have it! One is equal to two.
Your goal? Find the error in the proof. First to find it gets a big bear hug from a mushroom.
Ok, you can't divide both sides by (A-B) because you have to multiply out the brackets first. Didn't I already say this?
Yes, as in real-life, rules need to be followed in maths. Which makes me wonder whether there is any validity to it at all. Why can't it all just fall into place instead of someone having to make up "rules"? Seems strange that you have to follow things in a certain order, decided by some person (or group), to come to the universally agreed solution, doesn't it?
I think you better put us out of our misery... please. My head hurts.