mdjfnfn mdjfnfn
  • 23-06-2018
  • Mathematics
contestada

Which equation results from taking the square root of both sides (x-9)^2=81

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jdoe0001 jdoe0001
  • 23-06-2018
[tex]\bf (x-9)^2=81\implies \sqrt{(x-9)^2}=\sqrt{81}\implies x-9=\pm \sqrt{81} \\\\\\ x-9=\pm 9\implies x=\pm 9+9[/tex]
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gmany
gmany gmany
  • 23-06-2018
[tex](x-9)^2=81\\\\\sqrt{(x-9)^2}=\sqrt{81}\\\\|x-9|=9\iff x-9=9\ \vee\ x-9=-9\ \ \ |+9\\\\x=19\ \vee\ x=0[/tex]
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