## Precalculus (6th Edition) Blitzer

The function $f\left( x \right)={{x}^{2}}+8x-10$ is not discontinuous at any point.
Consider the function $f\left( x \right)={{x}^{2}}+8x-10$, Since the function $f\left( x \right)={{x}^{2}}+8x-10$ is a polynomial function, and all polynomial functions are continuous everywhere, thus, the function $f\left( x \right)={{x}^{2}}+8x-10$ is not discontinuous at any point.