## Algebra and Trigonometry 10th Edition

False. $\sqrt {-18}\sqrt {-2}\ne\sqrt {(-18)(-2)}$
$\sqrt {-18}\sqrt {-2}=3\sqrt 2i\sqrt 2i=3(\sqrt 2)^2i^2=3(2)(-1)=-6$ $\sqrt {(-18)(-2)}=\sqrt {36}=6$