Question

root 45 + root 80 - 3 root 20

Answer 1

Answer:

$\sqrt{5}$

Step-by-step explanation:

$\sqrt{45} + \sqrt{80} - 3 \sqrt{20}$

$3 \sqrt{5} + 4 \sqrt{5} - 3 \times 2 \sqrt{5}$

=

$\sqrt{5}$