Question

puteti sa-mi explicati rezolvarea asta ?
2xy+2x+2y+1=2x(y+1)+2y+2-1=2x(y+1)+2(y+1)-1=(2x+2()y+1)-1

Answer 1

2(xy+x+y+1)=2(xy+x+y+1)-1=2(xy+x+y+1)-1=2(x+y+1)-1 nu cred ca e bun