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HACTEHA [7]
3 years ago
14

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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