Check the math, please ...

[edgeprod]

16 - 36 = 25 - 45
Both result in -20, so they're equivalent, right?

(16 - 36) + 81/4 = (25 - 45) + 81/4
Since they're both equivalent, let's add 81/4 to each side

a^2 - 2*a*b + b^2 = (a - b)^2

or

4^2 - 2*4*(9/2) + (9/2)^2 = 5^2 - 2*5*(9/2) + (9/2)^2
(16 - 36 + 81/14 = 25 - 45 + 81/4)

4 - 9/2 = 5 - 9/2
Performed square root and subtraction from each side

4 = 5
Removed extraneous data (9/2) from each side

Therefore:

2+2 = 5

... right or wrong?

[Brujah]

wrong.

[CaptainHowdy]

Square root of negative one...

[dyna mo]

both trains arrive at 4 pm.

[GrouchyAdmin]

Think you forgot to run this past mrkris..

[Mike Honcho]

[blackmonsters]

a^2 - 2*a*b + b^2 = (a - b)^2

That would be a brand new kind of math than I never learned.

[mineistaken]

a^2 - 2*a*b + b^2 = (a - b)^2

That would be a brand new kind of math than I never learned.

where did you go to school?

[Odysseus]

(4 - 9/2)^2=(5 - 9/2)^2
|4 - 9/2|=|5 - 9/2|
4 - 9/2=+\-(5 - 9/2)
4 - 9/2 = -5 + 9/2
4 + 5 = 9/2 + 9/2
9 = 9
2 + 2 = 4 !!!

[dyna mo]

a^2 - 2*a*b + b^2 = (a - b)^2

That would be a brand new kind of math than I never learned.

i could be wrong, but from my trig days, i believe this is the pythagorean formula.

[blackmonsters]

where did you go to school?

Some dumb ass college that told me to solve the problem by isolating "a" and "b" and
defining "a" in terms of "b" or "b" in terms of "a" and then plugging in either a value for "a" or "b" and then solving the equation for the other variable.


Yeah, wish I could get my money back for that course.

[mineistaken]

Some dumb ass college that told me to solve the problem by isolating "a" and "b" and
defining "a" in terms of "b" or "b" in terms of "a" and then plugging in either a value for "a" or "b" and then solving the equation for the other variable.


Yeah, wish I could get my money back for that course.

As far as I remember its about 6th grade material, not college stuff

[Odysseus]

a^2 - 2*a*b + b^2 = (a - b)^2

That would be a brand new kind of math than I never learned.

(a - b)^2 = (a - b)*(a - b) = a*a - a*b - b*a + b*b = a^2 - a*b - a*b + b^2 = a^2 - 2a*b + b^2

a^2 - 2*a*b + b^2 = (a - b)^2

[cocetz3]

are you all motherfuckers on crack or what

[KickAssJesse]

2 + 2 = 4

[blackmonsters]

i could be wrong, but from my trig days, i believe this is the pythagorean formula.

Oh yeah,

Like a^2 + b^2 = c^2

It's like a^2 is one side of the triangle and b^2 is another side and c^2 is the hypotenuse.

what happens if you have value 7=c^2 and try to solve for c?

[Odysseus]

2+2=5 or 2*2=5 - this equates to only when you go to the bank to take credit! ;)

[edgeprod]

Hehehe, this is an old troll, but still a pretty fun one. Usually it ends with "WHERE IS YOUR GOD NOW?!"

[blackmonsters]

(a - b)^2 = (a - b)*(a - b) = a*a - a*b - b*a + b*b = a^2 - a*b - a*b + b^2 = a^2 - 2a*b + b^2

a^2 - 2*a*b + b^2 = (a - b)^2

I got this when I tried that :

(a - b)^2 = (a - b)*(a - b) = a(a - b) - b(a - b) = (a^2 - ab) - (ab - b^2) = a^2 - 2ab - b^2

[mineistaken]

I got this when I tried that :

(a - b)^2 = (a - b)*(a - b) = a(a - b) - b(a - b) = (a^2 - ab) - (ab - b^2) = a^2 - 2ab - b^2

please stop ..

[HomerSimpson]

math doesn't suck...
but does she (suck)?

[blackmonsters]

please stop ..

No, I must keep going until the truth is exposed.

[cam_girls]

Oldie but a goodie.

Much simpler version with a=2 b=1 and easier to follow.

I didn't check it, but I'm 99% sure you introduced an irrelevant root.

No use making a joke at this point as Americans don't Root!


CLUE

LET X = -2
X^2 = 4
X = SQRT(4)
X = 2

2 = -2

[justfreemovies]

hold up let me bust out my abacus..... ticking fills the room

[cam_girls]

So you've got

let
a^2 - 2ab + b^2 = c^2 -2cd + d^2

therefore
(a - b)^2 = (c - d)^2

therefore
(a - b) = (c - d)

let a = 1, b = 2, c =4, d = 3

(1 - 2)^2 = (4 - 3)^2

1 = 1

Even though (1 - 2) =/= (4 - 3)

so X^2 = Y^2
-/-> X = Y
(equal squares does not imply equal values)

[darksoul]

Heres one problem thats elementary and uses no tricks.
1/3 = 0.(3) (0.(3) means 0 followed by an infinite number of 3s 0.333333333333...)

1/3 + 1/3 + 1/3 = 3/3 = 1

0.(3) + 0.(3) + 0.(3) = 0.(9)

results:

1 = 0.(9) !

[cam_girls]

There is no possible number between 0.999999... and 1

so they must be equal.

[darksoul]

There is no possible number between 0.999999... and 1

so they must be equal.

0.(9) = 9/10
you're saying that
9/10 = 1 ? which equivs 9 = 10

[cam_girls]

0.9... = 9/9

[CPA37710T]

this is like playing some residet evil puzzle its so hard!!

[XV_Lawrence]

wrong )

[darksoul]

0.9... = 9/9

math is not something you make up on the way. If thats what you've been thought you should slap your math teacher.

[u-Bob]

0.(9) = 9/10
you're saying that
9/10 = 1 ? Which equivs 9 = 10

0.(9) != 9/10
0.9 = 9/10

[cam_girls]

1/9 = 0.11111...
2/9 = 0.22222...
3/9 = 0.33333...
4/9 = 0.44444...
5/9 = 0.55555...
6/9 = 0.66666...
7/9 = 0.77777...
8/9 = 0.88888...
9/9 = 0.99999...




Seems like a useful skill!

[cooldude7]

i was always bad at math.

[darksoul]

1/9 = 0.11111...
2/9 = 0.22222...
3/9 = 0.33333...
4/9 = 0.44444...
5/9 = 0.55555...
6/9 = 0.66666...
7/9 = 0.77777...
8/9 = 0.88888...
9/9 = 0.99999...

While the first 8 match, the 9th is made so your logic works because 9/9 =1 not 0.(9) because you say so.

Seems like a useful skill!

fuck off mister lunatic. Don't you need to count your rent money

[darksoul]

0.(9) != 9/10
0.9 = 9/10

my bad on that one

[cam_girls]

Huh? I haven't been corrected in 10,000 posts on sci.math in 10 years.

This is kindy stuff. Stop twisting my posts.

[darksoul]

Huh? I haven't been corrected in 10,000 posts on sci.math in 10 years.

This is kindy stuff. Stop twisting my posts.

Obviously, also nobody corrected you in your paranormal bullshit in hundreds of posts
mister Truman

[cam_girls]

So tell me a number BETWEEN 0.9.. recurring and 1.0 Smartass!

[Emil]

8 fishes.

[darksoul]

so tell me a number between 0.9.. Recurring and 1.0 smartass!

1 - 0.(9)

In all seriousness I've read this started a lot of debates so I'm going to let it go https://secure.wikimedia.org/wikipedia/en/wiki/0.999...
To me it seems that its just made to fit in so things work, but hey

[cam_girls]

yeh right SMART ASS!

ADAM WINS AGAIN! 100% RECORD

[darksoul]

yeh right SMART ASS!

ADAM WINS AGAIN! 100% RECORD

you know the saying.
even if you win, you're still retarted.
I pity you

[cam_girls]

being reTarted doesn't sound so bad! Looking forward to it in fact!