SOLUTION: What is the value of x, when x2 + 5 = 21?

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Question 798118: What is the value of x, when x2 + 5 = 21?
Answer by waynest(281) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 + 5 = 21
x^2 + 5 - 5 = 21 - 5
x^2 = 16
sqrt (x^2) = +-sqrt (16)
x = +- 4