Question

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

Answer 1

equation is 2x - 18 = 81

Explanation:

(x - 9)2 = 81

(2x - 18) = 81

taking the square root of both sides

`(√(2x - 18) ) = √(81)`

`(√(2x - 18))^2 = 81`

2x - 18 = 81

2x = 81 + 18

2x = 99

x = 99/2

x = 49.5