anonymous
  • anonymous
Find \sqrt{(-4x+5)^2}
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
\[\sqrt{(-4x+5)^2} \]
pigrenex
  • pigrenex
the answer is (-4x + 5)
anonymous
  • anonymous
Actually I remember something with absolute value.. My question is: Is it like this |-4x+5| or |4x+5| ?

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pigrenex
  • pigrenex
the square root and the exponent 2 are vanish
anonymous
  • anonymous
i think you are right, it would be \(|-4x+5|\)
pigrenex
  • pigrenex
idk, because if you multiply both equations, the answer is the same. (-).(-) = (+)
pigrenex
  • pigrenex
you could write \[\pm(-4x + 5)\]
anonymous
  • anonymous
Yes, maybe.. I went to wolfram to check, got something weird http://www.wolframalpha.com/input/?i=sqrt%7B%28-4x%2B5%29%5E2%7D+++ :P Haha, thank youuuu =)
pigrenex
  • pigrenex
but, satelite73 is not wrong. I think you can use both answers
anonymous
  • anonymous
Actually YES! Satellite is absolutely right :) |4x+5| is wrong. Thank you pigrenex!

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