Simplify x^2 = 3x for my math practice quiz!?

VeraB · Mar 30, 2013

This is level algebra 1. It is chapter 10 and I have a quiz tomorrow and the instructions are: " Simplify each rational expression if possible. Identify any excluded values.

The original problem is 2x/ x^2-3x
i need help finding the excluded value. I already simplified it. I look in my textbook, notes, and online so don't say "just do your homework" because I actually tried and I need help for this one problem. This is what yahoo answers is for. To HELP you. Thank you!!!

i already figured out the excluded value but i need to simplify it!! help?????

thanks bod for the help on the EV!
*bob

BobB · May 14, 2013

Since x^2 - 3 is in the denominator, any value that would make the denominator zero must be excluded. To find those values, subtract 3x from both sides to get:

x^2 - 3x = 0

Factor to:

x(x - 3) = 0

The solutions are 0 and 3.

To check, determine if both of them create a zero value in the denominator:

x^2 - 3x ===> 0^2 - 3(0) = 0 - 0 = 0 [the value 0 must be excluded]

x^2 - 3x ===> 3^2 - 3(3) = 9 - 9 = 0 [the value 3 must be excluded]

Simplify x^2 = 3x for my math practice quiz!?

VeraB

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BobB

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