SOLUTION: The square root of a number plus two times the square root of the same number is twelve. What is the number?

SOLUTION: The square root of a number plus two times the square root of the same number is twelve. What is the number?

Algebra.Com

Question 534347: The square root of a number plus two times the square root of the same number is twelve. What is the number?
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
sqrt(x) + 2*sqrt(x) = 3*sqrt(x) = 12
.
sqrt(x) = 12/3 = 4
.
x = 4^2 = 16
.
Answer: The number is 16.
.
Done.
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