Respuesta :

Answer:

Step-by-step explanation:

[tex]x=\frac{2}{3+\sqrt{7} } \times \frac{3-\sqrt{7} }{3-\sqrt{7} } =\frac{2(3-\sqrt{7} )}{3^2-7 } \\x=\frac{2(3-\sqrt{7}) }{2} =3-\sqrt{7} \\x-3=-\sqrt{7} \\(x-3)^2=(-\sqrt{7} )^2\\(x-3)^2=7[/tex]

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