find the excluded values of the following RAE.

[tex]1. \frac{ { \times }^{2 } + 4}{ { \times }^{2} - 14 \times + 49} [/tex]

[tex]2. \frac{5 \times }{ { \times }^{2} + 18 \times + 81 } [/tex]
PA ANSWER PO PLSSS​