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anonymous

  • one year ago

Solve x2 = 144. 72 12 ±12 −12

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  1. freckles
    • one year ago
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    well what numbers squared give you 144?

  2. freckles
    • one year ago
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    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

  3. freckles
    • one year ago
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    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)

  4. anonymous
    • one year ago
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    Thanks

  5. condor34
    • one year ago
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    x= positive or negative 12

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