Question

Se considera expresia E(x,y ) = $x^{2}$ - xy + 2x - 2y, x,y apartine lui R.
a) Descompuneti expresia E(x,y) in factori.
b) Determinati expresia E(x,y) in factori.

Answer 1

E ( x , y) = x· ( x - y )  + 2·( x - y )  = ( x - y ) · ( x + 2)