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lee25

Extremely EHEALTHy
Joined: 30 Dec 2003
Posts: 1018
Location: new york
I Need Help With My Math Homework
Posted: 10-11-04 00:58am
Well it's 65 problems, but I only need help with 6 of them. It's basic properties and reducing to lowest terms. If you see a number directly after a letter it's because square , the second third or forth power.


#15. 20 y2-45
--------------
10 y2- 5y- 15



#17. 12y-2xy-2 x2y
---------------
6y-4xy-2 x2y


#43. 4 x4 -25
----------------------
6 x3-4 x2 + 15x-10


#49. 1-9 a2
----------------
9 a2-6a+1



#51. Y2-2y+1
--------------
3-2y-y2


57. 28 x2-41x+15 12 x2-41x+24
-------------------- - -----------------
7x-5 3x-8


if someone could please help me I would really appreciate it.

Sorry I didn't know I came out so messy.

Brenda


Last edited by lee25 on 10-11-04 18:33pm; edited 1 time in total
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smith8500

Especially EHEALTHy
Joined: 17 Sep 2003
Posts: 6623
Location: Louisiana

Posted: 10-11-04 07:42am
Wow. Where is erin when we need her. Huni, I am horrible at math and I have no clue!
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IDABABY

Extremely EHEALTHy
Joined: 12 Mar 2004
Posts: 2236
Location: ***Wisconsin Baby***

Posted: 10-11-04 08:29am
I am also horrible at math!! Sorry hun!
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lauren22

Active User, Really EHEALTHy
Joined: 24 Jun 2004
Posts: 647
Location: Alabama

Posted: 10-11-04 09:31am
Hey I am working on them, but does anyone know what the stuff under them is??
It has the problem and then its that dotted line and there is stuff under there? Is that part of the problem? I'm confused!
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linuxChique

Extremely EHEALTHy
Joined: 05 May 2004
Posts: 4535

Posted: 10-11-04 11:41am
Here's the first two. I'm only on for a sec, so I don't know if i'll have time to do them all.



#15. 20 y2-45
---------------
10 y2- 5y- 15

5(4y2-9)
----------
5(2y2-y-3)

5(2y-3)(2y+3)
------------------
5(2y+3)(y-1)

(2y-3)
--------
(y-1)


#17. 12y-2xy-2 x2y
----------------------
6y-4xy-2 x2y

2y(6-x-x2)
-------------
2y(3-2x-x2)

2y(x-3)(x+2)
----------------
2y(x-3)(x+1)

(x+2)
---------
(x+1)


Last edited by linuxChique on 10-11-04 14:39pm; edited 1 time in total
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lauren22

Active User, Really EHEALTHy
Joined: 24 Jun 2004
Posts: 647
Location: Alabama

Posted: 10-11-04 11:43am
Edited!
Just forget this post!


Last edited by lauren22 on 10-11-04 12:09pm; edited 1 time in total
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pitterpatter

Active User, Really EHEALTHy
Joined: 15 Aug 2004
Posts: 619
Location: United States

Posted: 10-11-04 11:54am
In my opinion erin's is right. Lauren's is not simplified enough, although she's close to being there.
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linuxChique

Extremely EHEALTHy
Joined: 05 May 2004
Posts: 4535

Posted: 10-11-04 12:00pm
Lauren, the part under the dotted line is the denominator. These are fractions.
|
lauren22

Active User, Really EHEALTHy
Joined: 24 Jun 2004
Posts: 647
Location: Alabama

Posted: 10-11-04 12:08pm
Haha i'm stupid! Its that kinda day ya know!
|
pitterpatter

Active User, Really EHEALTHy
Joined: 15 Aug 2004
Posts: 619
Location: United States

Posted: 10-11-04 12:25pm
Nah your not stupid! We all do that.
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LaurensEntourage

Extremely EHEALTHy
Joined: 10 Sep 2004
Posts: 1302
Location: Austin, Texas

Posted: 10-11-04 14:14pm
Math comes so easily to me. I took tag algebra ii my freshman year in high school. It runs in my blood.
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linuxChique

Extremely EHEALTHy
Joined: 05 May 2004
Posts: 4535
Re: I Need Help With My Math Homework
Posted: 10-11-04 14:35pm
#43.
4 x4 -25
-----------------------
6 x3-4 x2 + 15x-10

(2x2-5)(2x2+5)
---------------------
(6x3+15x) - (4x2+10)

(2x2-5)(2x2+5)
---------------------
3x(2x2+5) - 2(2x2+5)

(2x2-5)(2x2+5)
---------------------
(3x-2)(2x2+5)

(2x2-5)
----------
(3x-2)

49.
1-9 a2
-----------
9 a2-6a+1

(1-3a)(1+3a)
----------------
(3a-1)(3a-1)

-1(3a-1)(1+3a)
----------------
(3a-1)(3a-1)

-(1+3a)
----------
(3a-1)

(1-3a)
----------
(3a-1)

51.
y2-2y+1
--------------
3-2y-y2

(y-1)(y-1)
-------------
(3+y)(1-y)

(y-1)
-------
(3+y)




#57.
had to do it like this to show the spacing right.


Code:

28 x2-41x+15                   12 x2-41x+24
-------------------    -     ----------------
    7x-5                         3x-8

(4x-3)(7x-5)                       (4x-3)(3x-8)
------------------     -     ----------------------
(7x-5)                             (3x-8)

(4x-3) - (4x-3) = 0


but the answer to that one is 0.
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