Solve x=frac{sqrt{2}-1}{sqrt{2}+1}

$$x= \frac{ \sqrt{ 2 } -1 }{ \sqrt{ 2 } +1 }$$

Solve for x

$$x=3-2\sqrt{2}\approx 0.171572875$$

Steps for Solving Linear Equation

Rationalize the denominator of \frac{\sqrt{2}-1}{\sqrt{2}+1} by multiplying numerator and denominator by \sqrt{2}-1.

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

Consider \left(\sqrt{2}+1\right)\left(\sqrt{2}-1\right). Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

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

Square \sqrt{2}. Square 1.

$$x=\frac{\left(\sqrt{2}-1\right)\left(\sqrt{2}-1\right)}{2-1}$$

Subtract 1 from 2 to get 1.

$$x=\frac{\left(\sqrt{2}-1\right)\left(\sqrt{2}-1\right)}{1}$$

Anything divided by one gives itself.

$$x=\left(\sqrt{2}-1\right)\left(\sqrt{2}-1\right)$$

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

$$x=\left(\sqrt{2}-1\right)^{2}$$

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

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

The square of \sqrt{2} is 2.

$$x=2-2\sqrt{2}+1$$

Add 2 and 1 to get 3.

$$x=3-2\sqrt{2}$$

Assign x

$$x≔3-2\sqrt{2}$$