Solve ∫ (from 2 to 7) of (4112x-(2(x-2))(-x-2/2))(7/23)

$$\int _ { 2 } ^ { 7 } ( 4112 x - ( 2 ( x - 2 ) ) ( - \frac { x - 2 } { 2 } ) ) ( \frac { 7 } { 23 } )$$

Evaluate

$$\frac{1943795}{69}\approx 28170.942028986$$

Solution Steps

Cancel out 2 and 2.

$$\int _{2}^{7}\left(4112x-\left(-\left(x-2\right)\left(x-2\right)\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Use the distributive property to multiply -\left(x-2\right) by x-2.

$$\int _{2}^{7}\left(4112x-\left(-\left(x-2\right)x+2x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Use the distributive property to multiply -1 by x-2.

$$\int _{2}^{7}\left(4112x-\left(\left(-x+2\right)x+2x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Use the distributive property to multiply -x+2 by x.

$$\int _{2}^{7}\left(4112x-\left(-x^{2}+2x+2x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Combine 2x and 2x to get 4x.

$$\int _{2}^{7}\left(4112x-\left(-x^{2}+4x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

To find the opposite of -x^{2}+4x-4, find the opposite of each term.

$$\int _{2}^{7}\left(4112x-\left(-x^{2}\right)-4x-\left(-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

The opposite of -x^{2} is x^{2}.

$$\int _{2}^{7}\left(4112x+x^{2}-4x-\left(-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

The opposite of -4 is 4.

$$\int _{2}^{7}\left(4112x+x^{2}-4x+4\right)\times \frac{7}{23}\mathrm{d}x$$

Combine 4112x and -4x to get 4108x.

$$\int _{2}^{7}\left(4108x+x^{2}+4\right)\times \frac{7}{23}\mathrm{d}x$$

Use the distributive property to multiply 4108x+x^{2}+4 by \frac{7}{23}.

$$\int _{2}^{7}4108x\times \frac{7}{23}+x^{2}\times \frac{7}{23}+4\times \frac{7}{23}\mathrm{d}x$$

Express 4108\times \frac{7}{23} as a single fraction.

$$\int _{2}^{7}\frac{4108\times 7}{23}x+x^{2}\times \frac{7}{23}+4\times \frac{7}{23}\mathrm{d}x$$

Multiply 4108 and 7 to get 28756.

$$\int _{2}^{7}\frac{28756}{23}x+x^{2}\times \frac{7}{23}+4\times \frac{7}{23}\mathrm{d}x$$

Express 4\times \frac{7}{23} as a single fraction.

$$\int _{2}^{7}\frac{28756}{23}x+x^{2}\times \frac{7}{23}+\frac{4\times 7}{23}\mathrm{d}x$$

Multiply 4 and 7 to get 28.

$$\int _{2}^{7}\frac{28756}{23}x+x^{2}\times \frac{7}{23}+\frac{28}{23}\mathrm{d}x$$

Evaluate the indefinite integral first.

$$\int \frac{28756x+7x^{2}+28}{23}\mathrm{d}x$$

Integrate the sum term by term.

$$\int \frac{28756x}{23}\mathrm{d}x+\int \frac{7x^{2}}{23}\mathrm{d}x+\int \frac{28}{23}\mathrm{d}x$$

Factor out the constant in each of the terms.

$$\frac{28756\int x\mathrm{d}x}{23}+\frac{7\int x^{2}\mathrm{d}x}{23}+\int \frac{28}{23}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x\mathrm{d}x with \frac{x^{2}}{2}. Multiply \frac{28756}{23} times \frac{x^{2}}{2}.

$$\frac{14378x^{2}}{23}+\frac{7\int x^{2}\mathrm{d}x}{23}+\int \frac{28}{23}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x^{2}\mathrm{d}x with \frac{x^{3}}{3}. Multiply \frac{7}{23} times \frac{x^{3}}{3}.

$$\frac{14378x^{2}}{23}+\frac{7x^{3}}{69}+\int \frac{28}{23}\mathrm{d}x$$

Find the integral of \frac{28}{23} using the table of common integrals rule \int a\mathrm{d}x=ax.

$$\frac{14378x^{2}}{23}+\frac{7x^{3}}{69}+\frac{28x}{23}$$

The definite integral is the antiderivative of the expression evaluated at the upper limit of integration minus the antiderivative evaluated at the lower limit of integration.

$$\frac{14378}{23}\times 7^{2}+\frac{7}{69}\times 7^{3}+\frac{28}{23}\times 7-\left(\frac{14378}{23}\times 2^{2}+\frac{7}{69}\times 2^{3}+\frac{28}{23}\times 2\right)$$

Simplify.

$$\frac{1943795}{69}$$