Olá Emanuel,
[tex3]\sqrt{x \, + \, 6} \, + \, \sqrt{x \, - \, 10} \, = \, \sqrt{x \, + \, 17} \, + \, \sqrt{x \, - \, 15}[/tex3]
[tex3](\sqrt{x \, + \, 6} \, + \, \sqrt{x \, - \, 10} \,)^2 = (\, \sqrt{x \, + \, 17} \, + \, \sqrt{x \, - \, 15})^2[/tex3]...