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Q: I Need Help With My Math Homework

asked by: lee25 on October 11th, 2004

Active User, very eHealthy

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 October 11th, 2004 06:33 PM; edited 1 time in total

Replies(11)

smith8500

replied on October 11th, 2004

Especially eHealthy

Wow. Where is erin when we need her. Huni, I am horrible at math and I have no clue!

IDABABY

replied on October 11th, 2004

Extremely eHealthy

I am also horrible at math!! Sorry hun!

lauren22

replied on October 11th, 2004

Active User, very eHealthy

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!

linuxChique

replied on October 11th, 2004

Extremely eHealthy

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)

lauren22

replied on October 11th, 2004

Active User, very eHealthy

Edited!
Just forget this post!

pitterpatter

replied on October 11th, 2004

Active User, very eHealthy

In my opinion erin's is right. Lauren's is not simplified enough, although she's close to being there.

linuxChique

replied on October 11th, 2004

Extremely eHealthy

Lauren, the part under the dotted line is the denominator. These are fractions.

lauren22

replied on October 11th, 2004

Active User, very eHealthy

Haha i'm stupid! Its that kinda day ya know!

pitterpatter

replied on October 11th, 2004

Active User, very eHealthy

Nah your not stupid! We all do that.

LaurensEntourage

replied on October 11th, 2004

Extremely eHealthy

Math comes so easily to me. I took tag algebra ii my freshman year in high school. It runs in my blood.

linuxChique

replied on October 11th, 2004

Extremely eHealthy

Re: I Need Help With My Math Homework

#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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