Answer:
[tex] \frac{7}{8} - \sqrt{6} \\ \\ \frac{7}{8} - \frac{8 \sqrt{6} }{8} = \frac{7 - 8 \sqrt{6} }{8} \\ \\ \frac{7 - 8(2.449)}{8} = \frac{7 - 19.592}{8} \\ \\ = \frac{ - 12.592}{8} = - 1.574[/tex]
I hope I helped you^_^
