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Hasil dari 7 + 6 13 + 2 42 adalah ....

Hasil dari $\frac{13 + 2 42}{7 + 6}$ adalah ....

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Ingat rumus :

$table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator square root of 13 plus 2 square root of 42 end root over denominator square root of 7 plus square root of 6 end fraction end cell equals cell fraction numerator square root of open parentheses 6 plus 7 close parentheses plus 2 square root of open parentheses 6 cross times 7 close parentheses end root end root over denominator square root of 7 plus square root of 6 end fraction end cell row blank equals cell fraction numerator square root of 6 plus square root of 7 over denominator square root of 7 plus square root of 6 end fraction cross times fraction numerator square root of 7 minus square root of 6 over denominator square root of 7 minus square root of 6 end fraction end cell row blank equals cell fraction numerator open parentheses square root of 6 plus square root of 7 close parentheses open parentheses square root of 7 minus square root of 6 close parentheses over denominator open parentheses square root of 7 close parentheses squared minus open parentheses square root of 6 close parentheses squared end fraction end cell row blank equals cell fraction numerator square root of 6 open parentheses square root of 7 minus square root of 6 close parentheses plus square root of 7 open parentheses square root of 7 minus square root of 6 close parentheses over denominator 7 minus 6 end fraction end cell row blank equals cell square root of 42 minus square root of 36 plus square root of 49 minus square root of 42 end cell row blank equals cell square root of 42 minus 6 plus 7 minus square root of 42 end cell row blank equals 1 end table$