anonymous
  • anonymous
Need help multiplying fractions with variables \[25x ^{2}/5x ^{2}-40x+80 * 5x-20/5x\]
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
i got 5x/25(x+4)
anonymous
  • anonymous
or 5x/25x+100
Directrix
  • Directrix
I am trying to figure out which terms are in the denominator. Grouping symbols would help out on that.

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anonymous
  • anonymous
let me write it out one sec
anonymous
  • anonymous
|dw:1332525146157:dw|
anonymous
  • anonymous
i did this |dw:1332525203453:dw|
anonymous
  • anonymous
oh which would give me 5x/(x+4) right
phi
  • phi
you can divide out a 5 the factor is (x-4)^2 not (x-4)(x+4)
anonymous
  • anonymous
where do you mean
phi
  • phi
Look at how you factored 5x^2 -40x + 80 FYI, people use a dot to show multiplication instead of an x, to avoid confusion.
Directrix
  • Directrix
I have (5x) / (x - 4) but am checking.
anonymous
  • anonymous
oh i see what your saying. because its + 80. I wrote it down wrong on my scratch paper. Phi is right
anonymous
  • anonymous
yea it is 5x/(x-4)
Directrix
  • Directrix
Phi's recommendation that you not use "x" for multiply and "x" for a variable in the same problem is an excellent one.
anonymous
  • anonymous
Ok will do thanks for the heads up
Directrix
  • Directrix
You did good work. Show an extra step or two to avoid tripping up.

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