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Pertanyaan

Maka 2 ab = ....

begin mathsize 14px style square root of a open parentheses square root of 5 plus square root of b close parentheses equals 5 square root of 2 plus 2 square root of 5 end style

Maka 2ab = ....

  1. 1

  2. 5

  3. 20

  4. 40

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N. Ayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Padang

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Pembahasan

Maka a = 10 dan b = 2 Sehingga

begin mathsize 14px style square root of a open parentheses square root of 5 plus square root of b close parentheses equals 5 square root of 2 plus 2 square root of 5 square root of a open parentheses square root of 5 plus square root of b close parentheses equals square root of 50 plus square root of 20 square root of a open parentheses square root of 5 plus square root of b close parentheses equals square root of 10 open parentheses square root of 5 plus square root of 2 close parentheses end style

Maka = 10 dan = 2

Sehingga

begin mathsize 14px style 2 a b equals 2 open parentheses 10 close parentheses open parentheses 2 close parentheses space space space space space space equals 40 end style    

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