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Racionalitzar 3

Racionalitzar és eliminar les arrels del denominador.

Si hi ha una suma o una diferència d'arrels al denominador, es multiplica el numerador i el denominador pel conjugat per aplicar

(a+b)(a-b)=a2-b2

Si no hi ha arrels al numerador:

fraction numerator 26 over denominator square root of 7 minus square root of 3 end fraction equals fraction numerator 26 bold times open parentheses square root of bold 7 bold plus square root of bold 3 close parentheses over denominator open parentheses square root of 7 minus square root of 3 close parentheses bold times open parentheses square root of bold 7 bold plus square root of bold 3 close parentheses end fraction equals fraction numerator 26 times open parentheses square root of 7 plus square root of 3 close parentheses over denominator 7 minus 3 end fraction equals fraction numerator 26 times open parentheses square root of 7 plus square root of 3 close parentheses over denominator 4 end fraction equals fraction numerator 13 times open parentheses square root of 7 plus square root of 3 close parentheses over denominator 2 end fraction

i es simplifica
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