3 divided by square root of 2 minus 1

3/√2−1

 

So you basically would just do order of operations.

 

first find the square root of 2.

3/1.41-1

 

then divide 3 by 1.41

 

2.13-1

 

subtract

 

your answer is 1.13

$$$$I assume you mean: Rationalize the denominator of

 

$$\\\frac{3}{\sqrt2-1}\\\\
=\frac{3}{\sqrt2-1}\times \frac{\sqrt2+1}{\sqrt2+1}\\\\
=\frac{3(\sqrt2+1)}{(\sqrt2-1)(\sqrt2+1)}\\\\
=\frac{3\sqrt2+3}{(2-1)}\\\\
=3\sqrt2+3$$

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