Solve -9x^2+5+6x-6-11x^2

$$- 9 x ^ { 2 } + 5 + 6 x - 6 - 11 x ^ { 2 }$$

Evaluate

$$-20x^{2}+6x-1$$

Solution Steps

Subtract 6 from 5 to get -1.

$$-9x^{2}-1+6x-11x^{2}$$

Combine -9x^{2} and -11x^{2} to get -20x^{2}.

$$-20x^{2}-1+6x$$

Differentiate w.r.t. x

$$6-40x$$

Steps Using Derivative Rule for Sum

Subtract 6 from 5 to get -1.

$$\frac{\mathrm{d}}{\mathrm{d}x}(-9x^{2}-1+6x-11x^{2})$$

Combine -9x^{2} and -11x^{2} to get -20x^{2}.

$$\frac{\mathrm{d}}{\mathrm{d}x}(-20x^{2}-1+6x)$$

The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax^{n} is nax^{n-1}.

$$2\left(-20\right)x^{2-1}+6x^{1-1}$$

Multiply 2 times -20.

$$-40x^{2-1}+6x^{1-1}$$

Subtract 1 from 2.

$$-40x^{1}+6x^{1-1}$$

Subtract 1 from 1.

$$-40x^{1}+6x^{0}$$

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

$$-40x+6x^{0}$$

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

$$-40x+6\times 1$$

For any term t, t\times 1=t and 1t=t.

$$-40x+6$$