Equation... Show Work Please and 10 Points will be rewarded

[From: ] [author: ] [Date: 11-08-07] [Hit: ]

For all x, (18)/ √(x^2+4) =6 , x^2=?

18 / √(x² + 4) = 6
√(x² + 4) = 3
x² + 4 = 9
x² = 5
x = ± √5

(18)/sqrt(x^2+4)=6
18/6=sqrt(x^2+4)
3=sqrt(x^2+4)
3^2={sqrt(x^2+4)}^2
9=x^2+4
x^2=9-4
x^2=5

9=x^2+4
x^2=5

~David

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