Question

Quanto que vale  Y = \sqrt32 - \sqrt{8 [/tex] ?

Answer 1

Olá, Ramon.

$32=2^5\Rightarrow 8=2^3\Rightarrow y=\sqrt{32}-\sqrt{8}\Rightarrow y=\sqrt{2^5}-\sqrt{2^3}\Rightarrow\\\\ y=\sqrt{2^4\cdot2}-\sqrt{2^2\cdot2}\Rightarrow y=4\sqrt{2}-2\sqrt{2}\Rightarrow \boxed{y=2\sqrt{2}}$