anonymous
  • anonymous
solve the radical equation √18x-9=x+4
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
there are a few possible first steps.. what do you think?
anonymous
  • anonymous
square it.
anonymous
  • anonymous
yea, then it's: 18x-9 = x^2 +8x +16 now what?

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anonymous
  • anonymous
add 9
anonymous
  • anonymous
ok, then it's: 18x = x^2 +8x +25 now what?
anonymous
  • anonymous
subtract 8x?
anonymous
  • anonymous
how is it 0?
anonymous
  • anonymous
opps. lol
anonymous
  • anonymous
lets subtrack 18x... then it's x^2 -10x + 25
anonymous
  • anonymous
=0
anonymous
  • anonymous
Okay, now factor it ?
anonymous
  • anonymous
totally
anonymous
  • anonymous
(x-5)(x-5)
anonymous
  • anonymous
so my answers 5?
anonymous
  • anonymous
so x = 5
anonymous
  • anonymous
idneeeeed.
anonymous
  • anonymous
thank you!
anonymous
  • anonymous
sure!

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