# Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set: 11

-6i

#### Work Step by Step

$-\sqrt(-36)=-(\sqrt(-36))=-(\sqrt (36\times-1))=-(\sqrt 36\times\sqrt -1)=-(6i)=-6i$ We know that $\sqrt -1=i$, because $i^{2}=-1$. In this case, we are finding the opposite of $\sqrt (-36)$.

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