anonymous
  • anonymous
perform the indicated operations & simplify 3z + 2z - 5 --- --- --- z^2-1 1-z z-1
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
first you'll need to get the have the same denominator:\[\frac{3z + 2z(-(z+1)) - 5(z-1)(z+1)}{(z+1)} \]\[= \frac{3z -2z^2-2z-5z^2+5}{(z+1)(z-1)}\]\[= \frac{z-7z^2+5}{(z-1)(z+1)}\]\[=\frac{-7z^2 +z +5}{(z-1)(z+1)}\] correct me if I'm wrong please ^_^
anonymous
  • anonymous
first step (z-1)(z+1) <-denominator, typo lol ^_^"
anonymous
  • anonymous
hmm, there's something wrong?

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anonymous
  • anonymous
I have \[(z(-2z-4)-5)/((z+1)(z-1)\]
anonymous
  • anonymous
I think it has to do with the 1-z thing
anonymous
  • anonymous
I think your solution has a wrong sign on the numerator?
anonymous
  • anonymous
hmm
anonymous
  • anonymous
lol yeah, the 2z(-(1+z)) right|? :)
anonymous
  • anonymous
lol
anonymous
  • anonymous
it should be 2z(z+1) ._. my bad lol sorry :)
anonymous
  • anonymous
sorry that answer is not correct
anonymous
  • anonymous
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anonymous
  • anonymous
?

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