Question

descompuneti in factori primi E (x,y)=(X+y)^2-1

Answer 1

   
$\bf E(x,y)=(x+y)^2-1 = (x+y)^2-1^2 = \boxed{\bf (x+y+1)(x+y-1) }$

Answer 2

E(x,y)=(x+y)²-1
         =(x+y)²-1²
          =(x+y+1)(x+y-1)