Respuesta :

[tex]\bf \textit{geometric mean of 7 and 12}\implies \cfrac{7}{x}=\cfrac{x}{12}\implies 84=x^2 \\\\\\ \sqrt{84}=x\implies \sqrt{2^2\cdot 21}=x\implies 2\sqrt{21}=x[/tex]
netlarue98

Answer:

[tex]2\sqrt{21}[/tex]

Step-by-step explanation: