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1.4-10=9-15; If , 6 1/4 is added both sides, it will be as :-
4-10+6 1/4= 9-15 +6 1/4 clear equality
2.So 4-10+ 25/4 =9-15 +25/4 still the same These look like
axa - 2ab +bxb similarly rt one cxc-2cd +dxd, make it.
2x2 -2x2x5/2+5/2x5/2 and rt one 3x3 -2x3x5/2 +5/2x5/2
3. final:_
(2-5/2)x(2-5/2) = (3-5/2)x(3-5/2)
( a-b) whole square and (c-d) whole square
4.Now work least and give answer clarify one clearing idea
with litle conformation and prove

2007-12-15 03:31:27 · 3 answers · asked by Anonymous in Science & Mathematics Mathematics

3 answers

Although I see how it was done (and it is a neat trick - no dividing by 0 involved), I don't see how that proves that 2=3.
If (a-b)^2 = (c-b)^2, it does not imply that a=c

(2-5/2)x(2-5/2) = (3-5/2)x(3-5/2)
(2-5/2)^2 = (3-5/2)^2
(-1/2)^2 = (1/2)^2
1/4=1/4

2007-12-15 03:55:09 · answer #1 · answered by Kris S 4 · 1 0

Without puzzling it through, I suspect (having seen a similar trick long ago) that one of the steps involves dividing by zero.

2007-12-15 11:40:15 · answer #2 · answered by aida 7 · 1 1

You're making everything look so complicated -.-
When finding the square root, it doesn't always have to be positive.

2007-12-15 11:52:08 · answer #3 · answered by UnknownD 6 · 1 0

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