# Evaluate: sqrt(-36)

## Expression: $\sqrt{ -36 }$

Write the number as a product with the factor $-1$

$\sqrt{ 36 \times \left( -1 \right) }$

The root of a product is equal to the product of the roots of each factor

$\sqrt{ 36 }\sqrt{ -1 }$

Write the number in exponential form with the base of $6$

$\sqrt{ {6}^{2} }\sqrt{ -1 }$

Use $\sqrt[2]{-1}=i$ to simplify the expression

$\sqrt{ {6}^{2} }i$

Reduce the index of the radical and exponent with $2$

$6i$

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