anonymous
  • anonymous
Will medal and fan.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
Solve the equation \[\sqrt{x+4}-3=1\] for the variable. Show each step of your solution process.
welshfella
  • welshfella
first add 3 to both sides of the equation then square both sides

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welshfella
  • welshfella
then its easy
anonymous
  • anonymous
Ok so \[\sqrt{x+4+3}-3=1+3\] So \[\sqrt{x+4}=4\]
anonymous
  • anonymous
And the \[\sqrt{x^2+16}=16\]
anonymous
  • anonymous
welshfella
  • welshfella
No when you 'square the square root' of something the answer is that something. for example sqrt 4 squared = 4
anonymous
  • anonymous
So take away the square root thing?
anonymous
  • anonymous
So just x+4 = 4
welshfella
  • welshfella
yea - so what do you get after sqrt(x + 4) = 4
welshfella
  • welshfella
no not x + 4 = 4 - BOTH SIDES of the equation must be squared
anonymous
  • anonymous
I'm not following, what would the left side be?
welshfella
  • welshfella
the keft side is x + 4 - that is correct but the right side must also be squared - the 4
anonymous
  • anonymous
So the right side is 16?
welshfella
  • welshfella
yes
anonymous
  • anonymous
x + 4 = 16
welshfella
  • welshfella
x + 4 = 16
anonymous
  • anonymous
Ah because it wasn't under the square root sign.
welshfella
  • welshfella
gotta go I think you got it now
welshfella
  • welshfella
yea

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