Radical din 80. Fast.

Răspuns :

[tex] \sqrt{80}= \sqrt{16*5}= \sqrt{16}* \sqrt{5}=4 \sqrt{5} [/tex]
[tex]\sqrt{80}=\sqrt{16*5}=\sqrt{16}\sqrt{5}=\sqrt{4*4}\sqrt{5}=4\sqrt{5}[/tex]