# Derivative of $1 - x^{2}$

The calculator will find the derivative of $1 - x^{2}$, with steps shown.

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Find $\frac{d}{dx} \left(1 - x^{2}\right)$.

### Solution

The derivative of a sum/difference is the sum/difference of derivatives:

$${\color{red}\left(\frac{d}{dx} \left(1 - x^{2}\right)\right)} = {\color{red}\left(\frac{d}{dx} \left(1\right) - \frac{d}{dx} \left(x^{2}\right)\right)}$$

Apply the power rule $\frac{d}{dx} \left(x^{n}\right) = n x^{n - 1}$ with $n = 2$:

$$- {\color{red}\left(\frac{d}{dx} \left(x^{2}\right)\right)} + \frac{d}{dx} \left(1\right) = - {\color{red}\left(2 x\right)} + \frac{d}{dx} \left(1\right)$$

The derivative of a constant is $0$:

$$- 2 x + {\color{red}\left(\frac{d}{dx} \left(1\right)\right)} = - 2 x + {\color{red}\left(0\right)}$$

Thus, $\frac{d}{dx} \left(1 - x^{2}\right) = - 2 x$.

$\frac{d}{dx} \left(1 - x^{2}\right) = - 2 x$A