anonymous
  • anonymous
Solve x2 = 144. 72 12 ±12 −12
Mathematics
jamiebookeater
  • jamiebookeater
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freckles
  • freckles
well what numbers squared give you 144?
freckles
  • freckles
here is example: solve x^2=9 well 3^2 and (-3)^2 both give by 9 so x=3 or x=-3 are both solutions to x^2=9
freckles
  • freckles
there are two solutions if you take the square of both sides you need to be careful of how you interpret sqrt(x^2) this actually is the same thing as |x| so \[x^2=144 \\ \sqrt{x^2}=\sqrt{144} \\ |x|=12 \\ \] this will give two solutions (not just one)

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anonymous
  • anonymous
Thanks
Condor34
  • Condor34
x= positive or negative 12

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