Question

Scrie sub forma de raport algebric:x+y-$\frac{ x^{2} + y^{2} }{x+y}$

Answer 1

( x+y) - (x²+y²)/(x+y) =[ (x+y)²-(x²+y²)]/(x+y)=(x²+2xy+y²-x²-y²)/(x+y)=2xy/(x+y)