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Bentuk rasional dari 27​−12​4​ adalah ...

Pertanyaan

Bentuk rasional dari begin mathsize 14px style fraction numerator 4 over denominator square root of 27 minus square root of 12 end fraction end style adalah ... 

D. Enty

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B 

Pembahasan

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator 4 over denominator square root of 27 minus square root of 12 end fraction end cell equals cell fraction numerator 4 over denominator square root of 27 minus square root of 12 end fraction cross times fraction numerator square root of 27 plus square root of 12 over denominator square root of 27 plus square root of 12 end fraction space end cell row blank equals cell fraction numerator 4 open parentheses square root of 27 plus square root of 12 close parentheses over denominator open parentheses square root of 27 minus square root of 12 close parentheses open parentheses square root of 27 plus square root of 12 close parentheses end fraction end cell row blank equals cell fraction numerator 4 open parentheses square root of 27 plus square root of 12 close parentheses over denominator 27 minus 12 end fraction end cell row blank equals cell fraction numerator 4 square root of 27 plus 4 square root of 12 over denominator 15 end fraction end cell row blank blank blank end table end style 

Jadi jawaban yang tepat adalah B 

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