Evaluate square root of -1^2+2^2

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

Step 1

One to any power is one.

$\sqrt{- 1 \cdot 1 + 2^{2}}$

Step 2

Multiply $- 1$ by $1$ .

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

Step 3

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

$\sqrt{- 1 + 4}$

Step 4

Add $- 1$ and $4$ .

$\sqrt{3}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$\sqrt{3}$

Decimal Form:

$1.73205080 \dots$

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