Solve ∫ (from 0 to 2) of left(xleft(x-2right)^2right)^2 wrt x

$$\int_{ 0 }^{ 2 } { \left(x { \left(x-2 \right) }^{ 2 } \right) }^{ 2 } d x$$

Evaluate

$$\frac{128}{105}\approx 1.219047619$$

Solution Steps

Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-2\right)^{2}.

$$\int _{0}^{2}\left(x\left(x^{2}-4x+4\right)\right)^{2}\mathrm{d}x$$

Use the distributive property to multiply x by x^{2}-4x+4.

$$\int _{0}^{2}\left(x^{3}-4x^{2}+4x\right)^{2}\mathrm{d}x$$

Square x^{3}-4x^{2}+4x.

$$\int _{0}^{2}x^{6}-8x^{5}+24x^{4}-32x^{3}+16x^{2}\mathrm{d}x$$

Evaluate the indefinite integral first.

$$\int x^{6}-8x^{5}+24x^{4}-32x^{3}+16x^{2}\mathrm{d}x$$

Integrate the sum term by term.

$$\int x^{6}\mathrm{d}x+\int -8x^{5}\mathrm{d}x+\int 24x^{4}\mathrm{d}x+\int -32x^{3}\mathrm{d}x+\int 16x^{2}\mathrm{d}x$$

Factor out the constant in each of the terms.

$$\int x^{6}\mathrm{d}x-8\int x^{5}\mathrm{d}x+24\int x^{4}\mathrm{d}x-32\int x^{3}\mathrm{d}x+16\int x^{2}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x^{6}\mathrm{d}x with \frac{x^{7}}{7}.

$$\frac{x^{7}}{7}-8\int x^{5}\mathrm{d}x+24\int x^{4}\mathrm{d}x-32\int x^{3}\mathrm{d}x+16\int x^{2}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x^{5}\mathrm{d}x with \frac{x^{6}}{6}. Multiply -8 times \frac{x^{6}}{6}.

$$\frac{x^{7}}{7}-\frac{4x^{6}}{3}+24\int x^{4}\mathrm{d}x-32\int x^{3}\mathrm{d}x+16\int x^{2}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x^{4}\mathrm{d}x with \frac{x^{5}}{5}. Multiply 24 times \frac{x^{5}}{5}.

$$\frac{x^{7}}{7}-\frac{4x^{6}}{3}+\frac{24x^{5}}{5}-32\int x^{3}\mathrm{d}x+16\int x^{2}\mathrm{d}x$$

Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x^{3}\mathrm{d}x with \frac{x^{4}}{4}. Multiply -32 times \frac{x^{4}}{4}.

$$\frac{x^{7}}{7}-\frac{4x^{6}}{3}+\frac{24x^{5}}{5}-8x^{4}+16\int x^{2}\mathrm{d}x$$

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 16 times \frac{x^{3}}{3}.

$$\frac{x^{7}}{7}-\frac{4x^{6}}{3}+\frac{24x^{5}}{5}-8x^{4}+\frac{16x^{3}}{3}$$

Simplify.

$$\frac{16x^{3}}{3}-8x^{4}+\frac{24x^{5}}{5}-\frac{4x^{6}}{3}+\frac{x^{7}}{7}$$

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.

$$\frac{16}{3}\times 2^{3}-8\times 2^{4}+\frac{24}{5}\times 2^{5}-\frac{4}{3}\times 2^{6}+\frac{2^{7}}{7}-\left(\frac{16}{3}\times 0^{3}-8\times 0^{4}+\frac{24}{5}\times 0^{5}-\frac{4}{3}\times 0^{6}+\frac{0^{7}}{7}\right)$$

Simplify.

$$\frac{128}{105}$$