48÷2(9+3) =

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Nov 29, 2006
15,685
4,199
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You guys crack me up with your "implied bracket" shit LOL its either in the equation to being with or not. You cant just add them when you feel like it LOL
 

MovingTarget

Diamond Member
Jun 22, 2003
9,002
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Ha so many fails in this thread but that one took the cake.

At least I knew and stated that I was being dumb. (Look, ma! No edits to my original post!) Bad math is very bad. I be trollin! :awe:

Commandment 1 of math: Read thy problem!
 

Matthiasa

Diamond Member
May 4, 2009
5,755
23
81
You guys crack me up with your "implied bracket" shit LOL its either in the equation to being with or not. You cant just add them when you feel like it LOL

I suggest you take higher lvl math or engineering classes and decide if that's the case.
 

TheVrolok

Lifer
Dec 11, 2000
24,254
4,090
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I suggest you take higher lvl math or engineering classes and decide if that's the case.

Could you provide me with a link to some information on these "implied parenthesis." I never took any math after high school (finished up calc 2/3 depending on how you look at it) and remember little as it is. However, I can't recall ever learning anything about "implied parenthesis."
 

Matthiasa

Diamond Member
May 4, 2009
5,755
23
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It's more related to understanding with what something is.
I have professor that to save space does that a lot.

On a very low lvl from my previous example which i took from the TI reasoning page for the ti85 for 1/2x a normal person would read that as 1/(2x)... however without those its becomes .5x which is quite different.

The pictures of that as an example from notes that a professor of mine does are posted earlier in this thread if you want them I'll actually screen shot my notebook and post a page all direct copies from what he did. It's done to save space for long equations when there isn't room to use to lines for every single division in the result of the derivation.
 

purbeast0

No Lifer
Sep 13, 2001
52,991
5,887
126
It's more related to understanding with what something is.
I have professor that to save space does that a lot.

On a very low lvl from my previous example which i took from the TI reasoning page for the ti85 for 1/2x a normal person would read that as 1/(2x)... however without those its becomes .5x which is quite different.

The pictures of that as an example from notes that a professor of mine does are posted earlier in this thread if you want them I'll actually screen shot my notebook and post a page all direct copies from what he did. It's done to save space for long equations when there isn't room to use to lines for every single division in the result of the derivation.

umm ... no, that is wrong.

1/2x = x/2 = .5x

1/(2x) is totally different.

fucking cant believe how fail people are in this thread, holy shit this is amazing on such a nerd forum such as ATOT.
 

MovingTarget

Diamond Member
Jun 22, 2003
9,002
115
106
It's more related to understanding with what something is.
I have professor that to save space does that a lot.

On a very low lvl from my previous example which i took from the TI reasoning page for the ti85 for 1/2x a normal person would read that as 1/(2x)... however without those its becomes .5x which is quite different.

The pictures of that as an example from notes that a professor of mine does are posted earlier in this thread if you want them I'll actually screen shot my notebook and post a page all direct copies from what he did. It's done to save space for long equations when there isn't room to use to lines for every single division in the result of the derivation.
I'm not even sure how that saves space. Why not write it as x/2 instead of (1/2)*x?
 

Matthiasa

Diamond Member
May 4, 2009
5,755
23
81
umm ... no, that is wrong.

1/2x = x/2 = .5x

1/(2x) is totally different.

fucking cant believe how fail people are in this thread, holy shit this is amazing on such a nerd forum such as ATOT.


No that's not wrong that example is straight from TI reasoning, so you think they are wrong?
Hate to tell you this but no they are not. Its how it is written by hand if you write that by hand you would never treat that is .5x as that would most likely not be as intended
So that would then make you wrong.

Should have broken the poll down by degrees.
 
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purbeast0

No Lifer
Sep 13, 2001
52,991
5,887
126
No that's not wrong that example is straight from TI reasoning, so you think they are wrong?
Hate to tell you this but no they are not. Its how it is written by hand if you write that by hand you would never treat that is .5x as that would most likely not be as intended
So that would then make you wrong.

Should have broken the poll down by degrees.

don't really care what your reasoning is ... it is wrong.

if that was written by hand, it wouldn't even use the / notation, it would be written with one number on top of the other, and the x right next to it.

and if it was all written in line just as typed, then you would still be wrong.

again, no matter what your reasoning is, it is wrong.

1/2x != 1/(2x)
 

Matthiasa

Diamond Member
May 4, 2009
5,755
23
81
That depends heavily on who you talk to.
If your currently going to a university ask all the math and engineering professors that question and see what they say...
I would be willing to bet it wouldn't be a single answer.
 
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James3shin

Diamond Member
Apr 5, 2004
4,426
0
76
It's more related to understanding with what something is.
I have professor that to save space does that a lot.

On a very low lvl from my previous example which i took from the TI reasoning page for the ti85 for 1/2x a normal person would read that as 1/(2x)... however without those its becomes .5x which is quite different.

The pictures of that as an example from notes that a professor of mine does are posted earlier in this thread if you want them I'll actually screen shot my notebook and post a page all direct copies from what he did. It's done to save space for long equations when there isn't room to use to lines for every single division in the result of the derivation.

You had to pick the one TI calculator that got the problem wrong. The TI-89, TI-86 and TI-83 all computed 288, I also believe they are more current. The TI-85 was wrong and so is the answer of '2'
 

Matthiasa

Diamond Member
May 4, 2009
5,755
23
81
The TI-Nspire™ also will also if not in ti-84 plus mode.
With the TI-Nspire™being the newest are you so sure about that?
 

SagaLore

Elite Member
Dec 18, 2001
24,036
21
81
Hold on here...

There is a big difference between 48/2(9+3) and 48/2*(9+3).

Let x=(9+3).

48/2x = ?

Those who are throwing in an extra * are changing the problem.
 
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MovingTarget

Diamond Member
Jun 22, 2003
9,002
115
106
Someone's invoking TI who can't make up their minds between -1²=-1 (correct) and -1²=1 (incorrect)??

That is one of my pet peeves. I still see students making this mistake every once in a while. Anyone past Algebra 1 should know the difference.
 
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