rational expression

irios

New member
Joined
Sep 29, 2010
Messages
1
I don't know how to begin to solve.

please help!
 

mmm4444bot

Super Moderator
Staff member
Joined
Oct 6, 2005
Messages
10,251


Firstly, focus !

Secondly, factor everything and cancel common factors above and below (it's easier to do this before multiplying)

Thirdly, multiply what's left after the cancellations

I welcome any specific questions that you have

 

Mrspi

Senior Member
Joined
Dec 17, 2005
Messages
2,128
Re:

mmm4444bot said:


Firstly, focus !


Thank you! I was just ready to call for an appointment to get a prescription for new glasses! I'm glad it isn't just me!
 

HamsterEater

New member
Joined
Sep 28, 2010
Messages
5
Let me see if I don't suck at basic algebra after so long:

14x[sup:eo0oui16]6[/sup:eo0oui16]/25y[sup:eo0oui16]3[/sup:eo0oui16] * 10y/21x[sup:eo0oui16]3[/sup:eo0oui16]

(14x[sup:eo0oui16]6[/sup:eo0oui16] * 10y) / (25y[sup:eo0oui16]3[/sup:eo0oui16] * 21x[sup:eo0oui16]3[/sup:eo0oui16])

(14x[sup:eo0oui16]3[/sup:eo0oui16] * 10) / (25y[sup:eo0oui16]2[/sup:eo0oui16] * 21)


So yeah, let's see how bad I did. :roll:
 

Denis

Senior Member
Joined
Feb 17, 2004
Messages
1,442
HamsterEater said:
(14x[sup:2becxh4t]6[/sup:2becxh4t] * 10y) / (25y[sup:2becxh4t]3[/sup:2becxh4t] * 21x[sup:2becxh4t]3[/sup:2becxh4t])

(13x[sup:2becxh4t]3[/sup:2becxh4t] * 10) / (25y[sup:2becxh4t]2[/sup:2becxh4t] * 21)
Should be:
(14x[sup:2becxh4t]3[/sup:2becxh4t] * 10) / (25y[sup:2becxh4t]2[/sup:2becxh4t] * 21)
Just a typo, right?
Can be further simplified to:
4x[sup:2becxh4t]3[/sup:2becxh4t] / (15y[sup:2becxh4t]2[/sup:2becxh4t])
 
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