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3 years ago

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

Mathematics

2 answers:

salantis [7]3 years ago

7 0

Answer:

13.41

Step-by-step explanation:

Hope it helps!

Korvikt [17]3 years ago

5 0

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 $\sqrt{5}$

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Answer:

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Answer:

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