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Pertanyaan

Bentuk sederhana dari fraction numerator square root of 3 plus square root of 5 over denominator 2 square root of 3 minus 3 square root of 5 end fraction equals......

  1. fraction numerator negative 21 minus 5 square root of 15 over denominator 33 end fraction

  2. fraction numerator negative 7 minus 4 square root of 15 over denominator 33 end fraction

  3. fraction numerator 21 minus 5 square root of 15 over denominator 33 end fraction

  4. fraction numerator 7 minus square root of 15 over denominator 33 end fraction

  5. fraction numerator 21 plus 5 square root of 15 over denominator 33 end fraction

F. Pratama

Master Teacher

Mahasiswa/Alumni Universitas Putra Indonesia YPTK Padang

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Pembahasan

fraction numerator square root of 3 plus square root of 5 over denominator 2 square root of 3 minus 3 square root of 5 end fraction open parentheses fraction numerator 2 square root of 3 plus 3 square root of 5 over denominator 2 square root of 3 plus 3 square root of 5 end fraction close parentheses  equals fraction numerator open parentheses square root of 3 plus square root of 5 close parentheses open parentheses 2 square root of 3 plus 3 square root of 5 close parentheses over denominator open parentheses 2 square root of 3 close parentheses squared minus open parentheses 3 square root of 5 close parentheses squared end fraction  equals fraction numerator 6 plus 3 square root of 15 plus 2 square root of 15 plus 15 over denominator 12 minus 45 end fraction  equals fraction numerator 21 plus 5 square root of 15 over denominator negative 33 end fraction equals fraction numerator negative 21 minus 5 square root of 15 over denominator 33 end fraction

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Diketahui a=7​+5​ dan b=7​−5​. Nilai dari a+bab​ adalah ....

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