Find the Exact Value |1-i|

$| 1 - i |$

Use the formula $| a + b i | = \sqrt{a^{2} + b^{2}}$ to find the magnitude.

$\sqrt{1^{2} + {(- 1)}^{2}}$

One to any power is one.

$\sqrt{1 + {(- 1)}^{2}}$

Raise $- 1$ to the power of $2$ .

$\sqrt{1 + 1}$

Add $1$ and $1$ .

$\sqrt{2}$

The result can be shown in multiple forms.

Exact Form:

$\sqrt{2}$

Decimal Form:

$1.41421356 \dots$