SOLUTION: Can you explain and solve this please (X-9)1/2=4

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Question 821271: Can you explain and solve this please (X-9)1/2=4
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
(X-9)1/2=4
multiply both sides of = by 2
X-9 = 8
add 9 to both sides of =
X = 17
check the answer
(17 - 9) * 1/2 = 4
8 * 1/2 = 4
4 = 4
answer checks