Solve (-2x)(-2x)

$$( - 2 x ) ( - 2 x )$$

Evaluate

$$4x^{2}$$

Solution Steps

Multiply x and x to get x^{2}.

$$-2x^{2}\left(-2\right)$$

Multiply -2 and -2 to get 4.

$$4x^{2}$$

Differentiate w.r.t. x

$$8x$$

Steps Using Definition of a Derivative

Multiply x and x to get x^{2}.

$$\frac{\mathrm{d}}{\mathrm{d}x}(-2x^{2}\left(-2\right))$$

Multiply -2 and -2 to get 4.

$$\frac{\mathrm{d}}{\mathrm{d}x}(4x^{2})$$

The derivative of ax^{n} is nax^{n-1}.

$$2\times 4x^{2-1}$$

Multiply 2 times 4.

$$8x^{2-1}$$

Subtract 1 from 2.

$$8x^{1}$$

For any term t, t^{1}=t.

$$8x$$