Question

Descompuneti in factori:
2xy-2x+(y-1) la puterea 2 +x la puterea 2

Answer 1

2xy-2x+y patrat-2y+1+x patrat + 2= 2x(y-1)+y(y-2) +3+x patrat

Answer 2

2xy  - 2x  + y²  - 2y  + 1 + x² 
= ( x² + 2xy + y² )  - 2x - 2y  + 1 
= ( x + y)²  -2( x + y)  + 1² 
      un alt binom 
  = ( x + y  - 1 )²