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Community > General Discussion

Topic: a little mind teaser
willy_cents Joined Sat 07/14/07 Posts: 4471	Wed 04/09/08 07:10 PM
a mathematical question: if A = B AB = B squared (mult both sides by same # maintains equality) AB - A squared = B squared - A squared (still maintain equality) A(B - A) = (B - A)(B + A) (simply factor both sides) A = B + A (divide by B - A) A = 2 A ( since A = B from above, substitute equals) 1 = 2 (divide both sides by A) and the mathematical system is shot full of holes?

bgeorge Joined Fri 09/14/07 Posts: 7850	Wed 04/09/08 07:11 PM
not tonite willy...i have a headache

link97my Joined Sun 01/06/08 Posts: 6798	Wed 04/09/08 07:11 PM


1956deluxe Joined Thu 12/06/07 Posts: 8559	Wed 04/09/08 07:11 PM
Huh?

nurjoyce Joined Thu 01/04/07 Posts: 10283	Wed 04/09/08 07:13 PM
C=D

lonely60777 Joined Tue 01/09/07 Posts: 727	Wed 04/09/08 07:14 PM
C=D See I knew one side was always bigger then the other

bgeorge Joined Fri 09/14/07 Posts: 7850	Wed 04/09/08 07:14 PM
C=D lol joyce...your answer kind of looks like an emoticon chef

ujGearhead Joined Wed 10/10/07 Posts: 6612	Wed 04/09/08 07:17 PM
C=D lol joyce...your answer kind of looks like an emoticon chef

nurjoyce Joined Thu 01/04/07 Posts: 10283	Wed 04/09/08 07:18 PM
C=D See I knew one side was always bigger then the other depends on how you look at it

nurjoyce Joined Thu 01/04/07 Posts: 10283	Wed 04/09/08 07:19 PM
C=D lol joyce...your answer kind of looks like an emoticon chef

phoenix314 Joined Thu 07/26/07 Posts: 4	Wed 04/09/08 07:21 PM
A = B + A (divide by B - A) The error is here. To get to this line, you divided by zero. (B-A is zero.) But division by zero is undefined, so everything from here forward is meaningless.

looook Joined Sat 12/15/07 Posts: 859	Wed 04/09/08 07:27 PM


willy_cents Joined Sat 07/14/07 Posts: 4471	Wed 04/09/08 07:36 PM
A = B + A (divide by B - A) The error is here. To get to this line, you divided by zero. (B-A is zero.) But division by zero is undefined, so everything from here forward is meaningless. quite correct. provided this little item to my Calc proffeessor..three days later he asked me for the answer because he could not figure it out...congrats to you

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