Verified answer

Réponse:

[tex]a = \sqrt{11 - \frac{3}{11} + 3 \sqrt{11} } [/tex]

[tex]a = \sqrt{ \frac{121 - 3 + 33 \sqrt{11} }{3} } = \sqrt{ \frac{118 + 33\sqrt{11} }{11} } [/tex]

[tex] \frac{ \sqrt{118 + 33 \sqrt{11} } }{ \sqrt{11} } [/tex]