Solve -14a+28a-35a

$$- 14 a + 28 a - 35 a$$

Evaluate

$$-21a$$

Solution Steps

Combine -14a and 28a to get 14a.

$$14a-35a$$

Combine 14a and -35a to get -21a.

$$-21a$$

Differentiate w.r.t. a

$$-21$$

Steps Using Definition of a Derivative

Combine -14a and 28a to get 14a.

$$\frac{\mathrm{d}}{\mathrm{d}a}(14a-35a)$$

Combine 14a and -35a to get -21a.

$$\frac{\mathrm{d}}{\mathrm{d}a}(-21a)$$

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

$$-21a^{1-1}$$

Subtract 1 from 1.

$$-21a^{0}$$

For any term t except 0, t^{0}=1.

$$-21$$