Solve 8x^2/32x^2+32x

$$\frac { 8 x ^ { 2 } } { 32 x ^ { 2 } + 32 x }$$

Evaluate

$$\frac{x}{4\left(x+1\right)}$$

Short Solution Steps

Factor the expressions that are not already factored.

$$\frac{8x^{2}}{32x\left(x+1\right)}$$

Cancel out 8x in both numerator and denominator.

$$\frac{x}{4\left(x+1\right)}$$

Expand the expression.

$$\frac{x}{4x+4}$$

Differentiate w.r.t. x

$$\frac{1}{4\left(x+1\right)^{2}}$$

Steps Using Derivative Rule for Quotient

For any two differentiable functions, the derivative of the quotient of two functions is the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator, all divided by the denominator squared.

$$\frac{\left(32x^{2}+32x^{1}\right)\frac{\mathrm{d}}{\mathrm{d}x}(8x^{2})-8x^{2}\frac{\mathrm{d}}{\mathrm{d}x}(32x^{2}+32x^{1})}{\left(32x^{2}+32x^{1}\right)^{2}}$$

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}.

$$\frac{\left(32x^{2}+32x^{1}\right)\times 2\times 8x^{2-1}-8x^{2}\left(2\times 32x^{2-1}+32x^{1-1}\right)}{\left(32x^{2}+32x^{1}\right)^{2}}$$

Simplify.

$$\frac{\left(32x^{2}+32x^{1}\right)\times 16x^{1}-8x^{2}\left(64x^{1}+32x^{0}\right)}{\left(32x^{2}+32x^{1}\right)^{2}}$$

Multiply 32x^{2}+32x^{1} times 16x^{1}.

$$\frac{32x^{2}\times 16x^{1}+32x^{1}\times 16x^{1}-8x^{2}\left(64x^{1}+32x^{0}\right)}{\left(32x^{2}+32x^{1}\right)^{2}}$$

Multiply 8x^{2} times 64x^{1}+32x^{0}.

$$\frac{32x^{2}\times 16x^{1}+32x^{1}\times 16x^{1}-\left(8x^{2}\times 64x^{1}+8x^{2}\times 32x^{0}\right)}{\left(32x^{2}+32x^{1}\right)^{2}}$$

To multiply powers of the same base, add their exponents.

$$\frac{32\times 16x^{2+1}+32\times 16x^{1+1}-\left(8\times 64x^{2+1}+8\times 32x^{2}\right)}{\left(32x^{2}+32x^{1}\right)^{2}}$$

Simplify.

$$\frac{512x^{3}+512x^{2}-\left(512x^{3}+256x^{2}\right)}{\left(32x^{2}+32x^{1}\right)^{2}}$$

Combine like terms.

$$\frac{256x^{2}}{\left(32x^{2}+32x^{1}\right)^{2}}$$

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

$$\frac{256x^{2}}{\left(32x^{2}+32x\right)^{2}}$$