Question

Which choice is equivalent to the expression √20 + √80

Answer 1

Answer:

13.41

Step-by-step explanation:

Hope it helps!

Answer 2

Answer:

6$\sqrt{5}$

Step-by-step explanation:

Using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

Simplifying the radicals

$\sqrt{20}$

= $\sqrt{4(5)}$

= $\sqrt{4}$ × $\sqrt{5}$ = 2$\sqrt{5}$

$\sqrt{80}$

= $\sqrt{16(5)}$

= $\sqrt{16}$ × $\sqrt{5}$ = 4$\sqrt{5}$

Then

$\sqrt{20}$ + $\sqrt{80}$

= 2$\sqrt{5}$ + 4$\sqrt{5}$

= 6$\sqrt{5}$