Respuesta :

You multiply top and bottom of the fraction by the conjugate of 5 - √2  which is 5 + √2.   This produces a rational denominator:-

=    √7 ( 5 + √2)  /   (5 - √2)(5 + √2)

=  √7 ( 5 + √2) /   (25 -2)

=   (√7 ( 5 + √2)) / 23    answer


Otras preguntas