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How to show root 20 is the same as 2 root 5
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How to show root 20 is the same as 2 root 5

User Peterdotjs
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1 Answer

3 votes

Answer:

See below

Explanation:

We first factor 20 as 4 · 5

so √20 = √(4 · 5) = √4 · √5 because √(a · b) = √a · √b

But √4 = 2

So √20 = 2 √5

User Bentley Carr
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