Math Is Fun Forum

power man

Member

Registered: 2006-12-26

Posts: 160

all numbers are equal

a + b = t
(a + b)(a - b) = t(a - b)
a^2 - b^2 = ta - tb
a^2 - ta = b^2 - tb
a^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4
(a - t/2)^2 = (b - t/2)^2
a - t/2 = b - t/2
a = b

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I hate people who hate people.
most people make mistakes, butt not me!
why     is     it     when     you     are     writing     something     important     you     run     out       of        spa

JaneFairfax

Member

Registered: 2007-02-23

Posts: 6,868

Re: all numbers are equal

Last edited by JaneFairfax (2007-02-24 03:04:13)

luca-deltodesco

Member

Registered: 2006-05-05

Posts: 1,470

Re: all numbers are equal

yes, as janefairfax said, the falicy is in taken the square roots.

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The Beginning Of All Things To End.
The End Of All Things To Come.

power man

Member

Registered: 2006-12-26

Posts: 160

Re: all numbers are equal

bad teacher bad
she was the one that told me.
bad teacher bad

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I hate people who hate people.
most people make mistakes, butt not me!
why     is     it     when     you     are     writing     something     important     you     run     out       of        spa

mathsyperson

Moderator

Registered: 2005-06-22

Posts: 4,900

Re: all numbers are equal

Ah, of course. I was focussing so hard on trying to find a division by 0 somewhere in there that I completely missed that other flaw. Well done, Jane.

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Why did the vector cross the road?
It wanted to be normal.