Question

ONE HUNDRED POINTS!!

Which is the correct second step for solving the equation (x+3)^2-4=18 ?
A. sqrt(x+3)^2 = ±sqrt(18)
B. sqrt(x+3)^2= ±sqrt(22)
C. sqrt(x+3)^2 = sqrt(18)
D. sqrt(x+3)^2 = sqrt(22)

Answer 1

B

Explanation:

We need to solve the equation:

`(x+3)^(2) -4=18`

`(x+3)^(2) -4+4=18+4\\`

`(x+3)^(2) =22`

`\sqrt{(x+3)^(2) } =` ±√22