Respuesta :

Using the geometric mean we can estimate the x value as:

[tex]\begin{gathered} x^2=20^2+20*15 \\ x^2=700 \\ x=\sqrt{700}=\sqrt{100*7}=\sqrt{10^2*7}=10\sqrt{7} \end{gathered}[/tex]

The answer is:

[tex]x=10\sqrt{7}[/tex]

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