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11 May, 10:08

Simplify radical 20.

I know the answer but just quizzing.

The first correct answer will be marked brainliest!

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Answers (1)
  1. 11 May, 10:24
    0
    2√5

    Step-by-step explanation:

    Use a factor tree to break down 20 into it's prime roots.

    20 = 2 x 10

    20 = 2 x 2 x 5

    These are the prime factors of 20, so we can rewrite √20 as

    (√2) (√2) (√5)

    (√2) (√2) = √ (2x2) = √4 = 2, so we have

    2√5
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