Author Topic: Let the flame war begin  (Read 300 times)

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Offline Alex Mason, SOG

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Re: Let the flame war begin
« Reply #45 on: April 15, 2011, 05:16:40 PM »
Not quite, your making several algebra mistakes.

first you cannot divide items in the denominator separately



But you are correct, multiplication and division have the same priority.

However, it's not order of operations that prevents you from doing this, its the basic rules of algebra that prevents you from calculating it like that.



Unless of course the OP wrote the equation ambiguously intentionally, using a little loop hole in standard equation writing.

48÷2(9+3) Generally means 48/(2*(9+3))

48÷2*(9+3) Can mean

48/(2*(9+3))
or
(48/2)*(9*3)

If that is the case, then it's just a failure on the OP's part to properly define an equation.

If he did intentionally write it that way, He is going to end up banned because stuff like that pisses me off  O:-)

If you want something to really mess with your brain, try this on for size.

a=b
ab=b²
ab-a²=b²-a²
a(b-a)=(b+a)(b-a)
a=b+a
a=a+a
1=2

I'll ask my teacher tomorrow. Google still agrees with me.....
http://lmgtfy.com/?q=48%2F2(9%2B3)

lets solve the red part, shall we?

(b+a)(b-a)
b*b       =b2
b*-a      =-ab
a*b       =ab
a*-a      = -a2

b2-ab+ab-a2
b2-a2

You didn't factor right.....
:3

Offline Xrain

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Re: Let the flame war begin
« Reply #46 on: April 15, 2011, 05:50:52 PM »
I'll ask my teacher tomorrow. Google still agrees with me.....
http://lmgtfy.com/?q=48%2F2(9%2B3)

lets solve the red part, shall we?

(b+a)(b-a)
b*b       =b2
b*-a      =-ab
a*b       =ab
a*-a      = -a2

b2-ab+ab-a2
b2-a2

You didn't factor right.....

Aha! the key is you don't factor at all, just divide both sides by (b-a)

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

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

a=a+b


Don't get me wrong there is something horribly wrong with that proof, I'm just curious to see if you can find it.  ;D
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Offline Alex Mason, SOG

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Re: Let the flame war begin
« Reply #47 on: April 15, 2011, 06:26:42 PM »
woops you did factor right (or divide, looks like factoring to me)

lets start replacing variables.

a=b                                                 kgood
ab=b²                                              aa=a2                   0=0
                                                        a2=a2                   0=0
ab-a²=b²-a²                                    aa-a2=a2-a2          0=0
a(b-a)=(b+a)(b-a)                           a(a-a)=(a+a)(a-a)
                                                        a(0)=(2a)(0)           0=0
a=b+a                                              ........  after replacing variable this makes NO sense, but I cant really explain it.
a=a+a
1=2

Xrain, I hate you. You confuse me too much.  :(
:3

Offline Shawn

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Re: Let the flame war begin
« Reply #48 on: April 15, 2011, 07:10:41 PM »
BEDMAS

 48÷2(9+3)
=
48/2(12)
=
48/24
=
2

Therefore the answer is 2.

FUCK i failed forgot to / first :(

48÷2(9+3)
=
48/2(12)
=
24x12
=
288

And 288 is the correct answer For those of you using a calculator and getting a different answer is because its not a scientific one


Offline Wafflepiezz

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Re: Let the flame war begin
« Reply #49 on: April 15, 2011, 07:18:04 PM »
This is interesting :3

Offline Alex Mason, SOG

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Re: Let the flame war begin
« Reply #50 on: April 15, 2011, 07:27:30 PM »
YESSSSS

Slowly getting moar people to think like me :D
:3

Offline Deacon

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Re: Let the flame war begin
« Reply #51 on: April 15, 2011, 08:34:15 PM »
IM THE FUCK OUT OF HERE BEFORE THE STUPID MOVES TO OTHER THR--

Offline Wafflepiezz

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Re: Let the flame war begin
« Reply #52 on: April 15, 2011, 10:22:08 PM »
IM THE FUCK OUT OF HERE BEFORE THE STUPID MOVES TO OTHER THR--

Offline Alex Mason, SOG

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:3

Offline Wafflepiezz

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Re: Let the flame war begin
« Reply #54 on: April 16, 2011, 09:51:54 AM »