kk jwban nomor 7 dan 8 gimana dan cara nya bntu kk ya

6.
[tex] \frac{ {x}^{2} + x - 6}{4 - \sqrt{ {x}^{2} + 12} } = \frac{ {2}^{2} + 2 - 6}{4 - \sqrt{ {2}^{2} + 12} } \\ \frac{4 + 2 - 6}{4 - \sqrt{16} } = \frac{0}{0} [/tex]