Equations with parenthesis?

misheeru · 2011-01-12 08:57:33

I did not say she is DDG to bobbym, she is DDG to me.

Last edited by misheeru (2011-01-12 08:57:41)

bobbym · 2011-01-12 08:58:32

Really! I did not know that.

misheeru · 2011-01-12 09:00:50

Is that sarcasm?

Btw I had this:

(m ³n + 8)(m ³n - 5)

and since I am in a hurry... my answer I got was:

m^6n² + 3m³n - 40

bobbym · 2011-01-12 09:05:00

That is correct. That is very good. You are getting it.

Sarah rebekah 14 · 2011-01-12 09:47:17

Hi bobbym Misheeru you are doing Good I got to get back posting math Problems.

bobbym · 2011-01-12 09:53:42

Yes, I have not seen any from you in a while.

Sarah rebekah 14 · 2011-01-13 07:41:33

Yes well heres one for you 18x3?

bobbym · 2011-01-13 08:15:42

Hi Sarah;

You go from your multiplication tables.

Put the 4 in the first column and carry the 2.

Now:

and remember to add the carried 2

And your done!

Sarah Rebekah 14 · 2011-01-13 08:54:30

Ok thanks you are so good with math.

bobbym · 2011-01-13 09:14:38

Did you understand it? Are you sure?

misheeru · 2011-01-13 12:59:24

bobbym wrote:

That is correct. That is very good. You are getting it.

Thanks. I thought so too... however then I came to this:

(3 - c² d)(4 - 4c²d)

I really have no idea what I'm doing wrong with this one, but I keep getting something different or something that doesn't look right.

bobbym · 2011-01-13 16:30:40

Well the first problem is that I cannot see what you have done! It is invisible. It may be right, it maybe crazy, it just might be a lunatic I am looking for...

Sarah Rebekah 14 · 2011-01-14 04:39:18

Hi my nice Friends I understand it Bobbym.

misheeru · 2011-01-14 08:12:35

Hello Sarah

Sorry bobbym...

Here is my answer/work:

(3 - c² d)(4 - 4c²d)

*F* 12

*O* -23c²d

*I* 4c²d

*L* -16c²d

=

12 - 12c²d + 4c²d - 16c²d
/ \
(-12c²d) + (4c²d)
/ \
= -8c^4d²

= 12 - 8c^4d² - 16c²d

bobbym · 2011-01-14 08:30:52

First the outer is wrong.

misheeru · 2011-01-14 08:35:39

Oops, the 23 was a typo, is -12c^2d also incorrect?

Last edited by misheeru (2011-01-14 08:35:47)

bobbym · 2011-01-14 08:36:34

Yep, that is also incorrect.

misheeru · 2011-01-14 08:39:04

3 x (-4) does not equal -12?

bobbym · 2011-01-14 08:43:20

(3 - c² d)(4 - 4c²d)

3 x (-4) does not equal -12?

Yes it does. Sorry, my mistake, thought I saw another d.

misheeru · 2011-01-14 08:45:35

Oh okay... I was so confused just now... I was trying to figure out what I did...

bobbym · 2011-01-14 08:46:24

Well, do not get confused. I am here. M is here. But inner is wrong...

misheeru · 2011-01-14 08:48:03

Wait... that should be negative, correct? Because c is negative? Is that it?

bobbym · 2011-01-14 08:49:37

That is correct. But last is wrong.

misheeru · 2011-01-14 08:51:37

(Oh... wait... that should be 4c²d, right?

I think I multiplied 4 and 4c²d instead of -c²d and -4c²d

bobbym · 2011-01-14 08:53:33

Nope.

Are not the 2 lasts (-c^2 d ) and (-4c^2 d) so where did your exponents go?

Math Is Fun Forum

#751 2011-01-12 08:57:33

Re: Equations with parenthesis?

#752 2011-01-12 08:58:32

Re: Equations with parenthesis?

#753 2011-01-12 09:00:50

Re: Equations with parenthesis?

#754 2011-01-12 09:05:00

Re: Equations with parenthesis?

#755 2011-01-12 09:47:17

Re: Equations with parenthesis?

#756 2011-01-12 09:53:42

Re: Equations with parenthesis?

#757 2011-01-13 07:41:33

Re: Equations with parenthesis?

#758 2011-01-13 08:15:42

Re: Equations with parenthesis?

#759 2011-01-13 08:54:30

Re: Equations with parenthesis?

#760 2011-01-13 09:14:38

Re: Equations with parenthesis?

#761 2011-01-13 12:59:24

Re: Equations with parenthesis?

#762 2011-01-13 16:30:40

Re: Equations with parenthesis?

#763 2011-01-14 04:39:18

Re: Equations with parenthesis?

#764 2011-01-14 08:12:35

Re: Equations with parenthesis?

#765 2011-01-14 08:30:52

Re: Equations with parenthesis?

#766 2011-01-14 08:35:39

Re: Equations with parenthesis?

#767 2011-01-14 08:36:34

Re: Equations with parenthesis?

#768 2011-01-14 08:39:04

Re: Equations with parenthesis?

#769 2011-01-14 08:43:20

Re: Equations with parenthesis?

#770 2011-01-14 08:45:35

Re: Equations with parenthesis?

#771 2011-01-14 08:46:24

Re: Equations with parenthesis?

#772 2011-01-14 08:48:03

Re: Equations with parenthesis?

#773 2011-01-14 08:49:37

Re: Equations with parenthesis?

#774 2011-01-14 08:51:37

Re: Equations with parenthesis?

#775 2011-01-14 08:53:33

Re: Equations with parenthesis?

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