Question

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

Answer 1

`(x-9)^2=81\\\\√((x-9)^2)=√(81)\\\\|x-9|=9\iff x-9=9\ \vee\ x-9=-9\ \ \ |+9\\\\x=19\ \vee\ x=0`

Answer 2

`\bf (x-9)^2=81\implies √((x-9)^2)=√(81)\implies x-9=\pm √(81) \\\\\\ x-9=\pm 9\implies x=\pm 9+9`