[tex] = \frac{-2 \times 1 \times 6}{2 \times 7} [/tex][tex] = \frac{-12}{14} [/tex][tex] = -\frac{6}{7} [/tex]
[tex] = \frac{-2 \times 1 \times 6}{2 \times 7} [/tex]
[tex] = \frac{-12}{14} [/tex]
[tex] = -\frac{6}{7} [/tex]