## Answer

## Step by step solution

Problem

Applying the quotient rule which states that if $f(x)$ and $g(x)$ are functions and $h(x)$ is the function defined by ${\displaystyle h(x) = \frac{f(x)}{g(x)}}$, where ${g(x) \neq 0}$, then ${\displaystyle h'(x) = \frac{f'(x) \cdot g(x) - g'(x) \cdot f(x)}{g(x)^2}}$

The derivative of the linear function is equal to $1$

The derivative of a sum of two functions is the sum of the derivatives of each function

The derivative of the constant function is equal to zero

The power rule for differentiation states that if $n$ is a real number and $f(x) = x^n$, then $f'(x) = nx^{n-1}$

$x+0=x$, where $x$ is any expression

Multiply $2$ times $-1$

Any expression multiplied by $1$ is equal to itself

When multiplying exponents with same base you can add the exponents

Adding $-2x^2$ and $x^2$