Question

Factoriza:
URGENTE
(xy+1)²-(x+y)²+4xy

Answer 1

(xy) 2 - 2(xy)(1)+(1)2 - ((xy)2 -2(x)(y) + (y)2 ) + 4xy
x2y2-2xy+1 - x2y2 + 2xy + y2 + 4xy 
quedaria: y (y+4x)  +1