# How do you find the square root of 80?

Mar 26, 2015

$80 = 4 \cdot 20 = 4 \cdot 4 \cdot 5$

$\sqrt{80} = \sqrt{4} \sqrt{4} \sqrt{5} = 2 \cdot 2 \cdot \sqrt{5} = 4 \sqrt{5}$

(Or do you want a decimal approximation?)

Mar 26, 2015

$80 = 2 \cdot 2 \cdot 2 \cdot 2 \cdot 5$

$80 = 16 \cdot 5$

$\sqrt{80} = \sqrt{16} \cdot \sqrt{5}$

$\sqrt{80} = 4 \sqrt{5}$