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![[Post New]](/templates/default/images/icon_minipost_new.gif) posted on 24 Jun 2007 21:56:46 IST
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Find what's wrong with the proof: 16 - 36 = 25 - 45  (4 2) - (2 * 4 * 9/ 2) = (5 2) - (2 * 5 * 9/ 2) (4 2) - (2 * 4 * 9/ 2) + ( 81/ 4) = (5 2) - (2 * 5 * 9/ 2) + ( 81/ 4) (Add (81/4) on both side) (4 - 9/ 2) 2 = (5 - 9/ 2) 2 ( (81/4) = (9/2)2 and applying a2 - 2ab + b2 = (a - b)2 ) 4 - 9/ 2 = 5 - 9/ 2 (Taking positive sq. root on both sides) 4 = 5 .......??? TRY AND FIND OUT !!!!!!!
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(posted on 24 Jun 2007 22:18:44 IST)
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o c'mon....very old joke..........
what the hell does taking +ve sqrt mean....is it sum new concept introduced in the field of mathematics......huh...!! |
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(posted on 24 Jun 2007 22:19:13 IST)
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| infact...u shud have put it in the PJ section...lol.. |
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(posted on 24 Jun 2007 22:31:16 IST)
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| Hey "fused bulb" did your brain bulb fuse. What's the sqrt of 4.... |
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(posted on 24 Jun 2007 22:32:25 IST)
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| it's +2 or -2 +ve sqrt means +2 ...huh..!! |
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(posted on 25 Jun 2007 14:42:53 IST)
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| pavan ur last but 1 step is wrong....what do u mean when u say 'taking +ve root'???....a squared =b squared doesnt imply a=b.....it implies either a=b or a+b=0,latter being true here. |
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(posted on 25 Jun 2007 19:00:25 IST)
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| Wonderful cooldude but tell me How can we make the last step true here? |
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(posted on 25 Jun 2007 19:02:24 IST)
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| That is a+b=0...?? |
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(posted on 26 Jun 2007 06:25:16 IST)
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| ya it is 0.......4+5-9/2-9/2...common u can do that... |
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(posted on 11 Aug 2007 20:19:29 IST)
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(4 - 9/2 )sq = ( 5 - 9/2 )sq
u dont solve this equation by jus takin sq root u have to bring terms to one side to form asquare - bsquare type of equation
and u get 5 - 9/2 = 9/2 - 4
which is true as 9/2 is 4.5 and it lies between 4 and 5 |
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(posted on 12 Aug 2007 07:21:34 IST)
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hey pavan
-10=-10
is not a correct form of eqation only hence ur eqn.
16 - 36 = 25 - 45
is not crct. hope u get it |
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(posted on 12 Aug 2007 13:34:37 IST)
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4- 9/2 = 4- 4.5 <0
square root of x^2 is given by |x|....so here square root of (4-4.5)^2 will be |4-9/2| = .5
and 5-9/2>0 so square root of (5-9/2)^2 = 5-9/2
that means we are getting right result...i.e. , .5=.5 |
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