Answered

(1/x-1/y) / (1/x^2+1/y^2)

Sagot :

AwesomeHelperviz
1/x - 1/y = -x +y over xy 
1/x^2+1/y^2 = x^2 + y^2 over x^2 y^

= -x^2y+xy^2 over x^2+y^2

Shaundavidcalfoviz
  ( 1/x - 1/y )  / ( 1/x² + 1/y² )
=( y-x/xy ) / ( x²+y²/x²y² )
=( y-x/xy ) · ( x²y²/x²+y² )
=( x²y³ - x³y² ) / ( x³y + xy³)
=( xy² - x²y ) / ( x² + y² )