phoenix_nf Posted January 27, 2005 Share Posted January 27, 2005 16 - 36 = 25 - 4516 - 36 + (81/4) = 25 - 45 + (81/4)(4^2) - 2 * 4 * (9/2) + [(9/2)^2] = (5^2) - 2 * 5 * (9/2) + [(9/2)^2] [4 - (9/2)]^2 = [5 - (9/2)]^2taking sq. roots on both sides.4 - (9/2) = 5 - (9/2)Adding (9/2) on both sides we get:4 = 5 (or) 2 + 2 = 5(find the error)__________________________________________You can do a similar thing using the equation:4 - 10 = 9 - 15add (25/4) to both sides to get 2 = 3 Link to comment Share on other sites More sharing options...
indianarchie Posted January 27, 2005 Share Posted January 27, 2005 doh man...do ur own math homework! Link to comment Share on other sites More sharing options...
Spyder2k Posted January 27, 2005 Share Posted January 27, 2005 [4 - (9/2)]^2 = [5 - (9/2)]^2taking sq. roots on both sides.4 - (9/2) = 5 - (9/2)4 - (9/2) = -.55 - (9/2) = .5when you did the square root you left out 'The square rot of a number is +/-', in this case we have a definite answer for '4 - (9/2)' for which the answer is negative, clearly left out in the proceding equation. Now i got one of me ownA = BA^2 = ABA^2 - B^2 = AB - B^2(A+B)(A-B) = B(A-B)(A+B) = BA+A = A2A = A2 = 1 Link to comment Share on other sites More sharing options...
phoenix_nf Posted January 27, 2005 Author Share Posted January 27, 2005 Gr8, now try it on u r friends....many dont get what hit em. Link to comment Share on other sites More sharing options...
FAT64 Posted January 27, 2005 Share Posted January 27, 2005 That's an easy one, in line 4 you are dividing both sides by ( A - B ) which is zero!! Link to comment Share on other sites More sharing options...
MadGutts Posted January 27, 2005 Share Posted January 27, 2005 Blimey.. my shool daze are well and truely over! so i can't even remember half of it! including algebra....... Not that anyone ever did understand algebra!! Link to comment Share on other sites More sharing options...
army20 Posted January 30, 2005 Share Posted January 30, 2005 Tahy said on high school that i needed high maths to go into computing. I've forgot everything and i'm doing my job well Link to comment Share on other sites More sharing options...
phoenix_nf Posted January 30, 2005 Author Share Posted January 30, 2005 SPyder2K you gr8 manthe sq. root was the error.example.(2)^2 = 4(-2)^2 = 4but 2 <> -2 Link to comment Share on other sites More sharing options...
sven Posted January 31, 2005 Share Posted January 31, 2005 hum.. wouldn't it be simpler just to say the equation is -20=-20? Link to comment Share on other sites More sharing options...
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