This proves my A-Level Maths teacher was wrong!!!!! - HotUKDeals
We use cookie files to improve site functionality and personalisation. By continuing to use HotUKDeals, you accept our cookie and privacy policy.
Get the HotUKDeals app free at Google Play

#### Search Error

An error occurred when searching, please try again!

# This proves my A-Level Maths teacher was wrong!!!!!

£0.00 @
Proof that 1 = 2 (for those that don't know, the little "^" means to the power of, as in 2^2, 2 squared) If a=1 and b=1 then... a^2 - b^2 = 0 and a^2 - ab = 0 ...therefor… Read More
9y, 2w agoPosted 9 years, 2 weeks ago
Proof that 1 = 2

(for those that don't know, the little "^" means to the power of, as in 2^2, 2 squared)

If a=1 and b=1 then...

a^2 - b^2 = 0

and

a^2 - ab = 0

...therefore...

a^2 - ab = a^2 - b^2

...and by factorising...

a(a-b) = (a+b)(a-b)

...and then dividing by (a-b)...

a = a+b

...therefore...

1=2

Done.

AS YOUR MATH TEACHER WOULD SAY FAIL FAIL FAIL
- SpecialK
9y, 2w agoPosted 9 years, 2 weeks ago
Options

(20)
#1
[SIZE="3"]Oh i see!![/SIZE]

[SIZE="1"]Not![/SIZE]
#2
wrong!
#3
a^2 b^2 = 0

Doesn't that equal 1?

Not sure if this is a joke or supposed to be true???
#4
guerilla;2248109
wrong!

follow the math, it's infallible
#5
[quote=Benjimoron;2248115]a^2 b^2 = 0

Doesn't that equal 1?[quote]

sorry, i left out some minus signs. :oops:

let me fix it.

Edit: Fixed now, sorry! :oops:
#6
see i told you it was wrong!
#7
guerilla;2248137
see i told you it was wrong!

yeah, sorry about that.:oops:

but it's right now :thumbsup:
#8
you cant divide something by zero though
#9
2nd equation is still wrong:oops:
#10
"...and then dividing by (a-b)..."

WRONG!

You can't divide something by zero, I looked it up!
#11
a = a+b is not 1=2!

its a - a = b
then b=0 which is not 1!

you have to finish solving the equation, not directly substitute it with your assumption that a=1 and b=1
#12
what the.......
#13
:lol:

The fun I used to have trying to prove to people that x/0 = I keep the remainder ;-)
#14
In Equation 3:

[CENTER]a^2 - ab = a^2 - b^2 [/CENTER]

you are proving that 0 = 0.

From that point you can do almost any damn thing!

Looks cool, though.
#15
If a,b=1 then a-b=0 and you can't divide by zero!

#16
Your assumption is flawed. Just because

a^2 - b^2 resolves to zero
and
a^2 - ab resolves to zero

does not mean that

a^2 - b^2 equals a^2 - ab

It's like saying
ab = 0
and
ac = 0
therefore
b = c

No, because a could equal 0
#17
actually,

either a=1 and b=-1 or vice versa

then it works.:whistling:
#18
what you have here is known as the long tail of knowledge. Where someone can state something and as a result of the internet other people with more knowledge correct them.

For example, NASA released some figures regarding a shuttles engine claiming it did this that and the other, and someone one on a blog saw it all and was like WRANG and corrected it all.

brillinat
#19
I didn't understand past the second line!
#20
I don't think in algebra you can designate the 2 variables 'a' and 'b' with the same number!