[tex] {(7 + \sqrt{6}) }^{2} = {7}^{2} + 2 \times (7 )\times (\sqrt{6} ) + { (\sqrt{6} )}^{2} \\ [/tex]
[tex]( {7 + \sqrt{6} })^{2} = 49 + 14 \sqrt{6} + 6[/tex]
[tex] {(7 + \sqrt{6}) }^{2} = 55 + 14 \sqrt{6} [/tex]
