### Home > PC > Chapter 1 > Lesson 1.3.2 > Problem1-115

1-115.

Given $f\left(x\right) = x^{2} + 1$, $g\left(x\right) = 2x − 8$, and $h(x)=\frac{1}{2}x+1$. Find the following:

1. $f\left(x\right) + g\left(x\right)$

$x^2+2x-7$

1. $g\left(x\right)h\left(x\right)$

$x^2-2x-8$

1. $g\left(h\left(x\right)\right)$

$x-6$

1. $f\left(f\left(x\right)\right)$

$x^4+2x^2+2$