mdjfnfn mdjfnfn
  • 23-06-2018
  • Mathematics
contestada

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

Respuesta :

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]
Answer Link
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]
Answer Link

Otras preguntas

solve h=-16t^2+20t+6?​
What is the average rete of change from x=0 to x=-2
Please help me anyone!
What are the steps to solve the quadratic equation x^2+4x-6=0
What is the value of this expression A) -29 B) -26 C) 3 D) 4
Point′is the image of Q(3,−4) under a reflection across the x-axis.
What type of energy makes up most of the internal energy of a solid substance
How did british companies treat american customers after the revolution
Georges asked five of his friends how long they studied for the last math test and what grade they received. He found a linear regression equation for the data
Which of the Enlightenment ideals—rationalism, empiricism, progressivism, or cosmopolitanism—do you think was most important to its spread? Describe mercantilis