Solve 1/4(x+1)(x-1)(x-1)(x+1)+x^2=1/4(x^2+1)(x^2+1)

$$\frac{ 1 }{ 4 } (x+1)(x-1)(x-1)(x+1)+ { x }^{ 2 } = \frac{ 1 }{ 4 } ( { x }^{ 2 } +1)( { x }^{ 2 } +1)$$

Solve for x (complex solution)

$$x\in \mathrm{C}$$

Solution Steps

Multiply x+1 and x+1 to get \left(x+1\right)^{2}.

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

Multiply x-1 and x-1 to get \left(x-1\right)^{2}.

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

Multiply x^{2}+1 and x^{2}+1 to get \left(x^{2}+1\right)^{2}.

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

Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+1\right)^{2}.

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

Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-1\right)^{2}.

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

Use the distributive property to multiply \frac{1}{4} by x^{2}+2x+1.

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

Use the distributive property to multiply \frac{1}{4}x^{2}+\frac{1}{2}x+\frac{1}{4} by x^{2}-2x+1 and combine like terms.

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

Combine -\frac{1}{2}x^{2} and x^{2} to get \frac{1}{2}x^{2}.

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

Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x^{2}+1\right)^{2}.

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

To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.

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

Use the distributive property to multiply \frac{1}{4} by x^{4}+2x^{2}+1.

$$\frac{1}{4}x^{4}+\frac{1}{2}x^{2}+\frac{1}{4}=\frac{1}{4}x^{4}+\frac{1}{2}x^{2}+\frac{1}{4}$$

Subtract \frac{1}{4}x^{4} from both sides.

$$\frac{1}{4}x^{4}+\frac{1}{2}x^{2}+\frac{1}{4}-\frac{1}{4}x^{4}=\frac{1}{2}x^{2}+\frac{1}{4}$$

Combine \frac{1}{4}x^{4} and -\frac{1}{4}x^{4} to get 0.

$$\frac{1}{2}x^{2}+\frac{1}{4}=\frac{1}{2}x^{2}+\frac{1}{4}$$

Subtract \frac{1}{2}x^{2} from both sides.

$$\frac{1}{2}x^{2}+\frac{1}{4}-\frac{1}{2}x^{2}=\frac{1}{4}$$

Combine \frac{1}{2}x^{2} and -\frac{1}{2}x^{2} to get 0.

$$\frac{1}{4}=\frac{1}{4}$$

Compare \frac{1}{4} and \frac{1}{4}.

$$\text{true}$$

This is true for any x.

$$x\in \mathrm{C}$$

Solve for x

$$x\in \mathrm{R}$$

Solution Steps

Multiply x+1 and x+1 to get \left(x+1\right)^{2}.

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

Multiply x-1 and x-1 to get \left(x-1\right)^{2}.

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

Multiply x^{2}+1 and x^{2}+1 to get \left(x^{2}+1\right)^{2}.

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

Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+1\right)^{2}.

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

Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-1\right)^{2}.

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

Use the distributive property to multiply \frac{1}{4} by x^{2}+2x+1.

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

Use the distributive property to multiply \frac{1}{4}x^{2}+\frac{1}{2}x+\frac{1}{4} by x^{2}-2x+1 and combine like terms.

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

Combine -\frac{1}{2}x^{2} and x^{2} to get \frac{1}{2}x^{2}.

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

Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x^{2}+1\right)^{2}.

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

To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.

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

Use the distributive property to multiply \frac{1}{4} by x^{4}+2x^{2}+1.

$$\frac{1}{4}x^{4}+\frac{1}{2}x^{2}+\frac{1}{4}=\frac{1}{4}x^{4}+\frac{1}{2}x^{2}+\frac{1}{4}$$

Subtract \frac{1}{4}x^{4} from both sides.

$$\frac{1}{4}x^{4}+\frac{1}{2}x^{2}+\frac{1}{4}-\frac{1}{4}x^{4}=\frac{1}{2}x^{2}+\frac{1}{4}$$

Combine \frac{1}{4}x^{4} and -\frac{1}{4}x^{4} to get 0.

$$\frac{1}{2}x^{2}+\frac{1}{4}=\frac{1}{2}x^{2}+\frac{1}{4}$$

Subtract \frac{1}{2}x^{2} from both sides.

$$\frac{1}{2}x^{2}+\frac{1}{4}-\frac{1}{2}x^{2}=\frac{1}{4}$$

Combine \frac{1}{2}x^{2} and -\frac{1}{2}x^{2} to get 0.

$$\frac{1}{4}=\frac{1}{4}$$

Compare \frac{1}{4} and \frac{1}{4}.

$$\text{true}$$

This is true for any x.

$$x\in \mathrm{R}$$