Question

What values are not in the domain of (-5+2x^2)/7-8x ?

Answer 1

$\frac{-5 + 2x^{2}}{7 - 8x}$

The denominator cannot equal zero.

7 - 8x ≠ 0

7       ≠  8x

    $\frac{7}{8} \neq \frac{8x}{8}$

$\frac{7}{8} \neq x$

Answer: $\frac{7}{8}$ is not in the domain