Question

 como resolver?
(3+2xy) (xy+1), se x = 2 

Answer 1

se, x = 2
(3 + 2xy).(xy + 1)
(3 + 2*2y).(2*y + 1)
(3 + 4y).(2y +1)
simplifique
3*2y + 3*1 + 4y*2y + 4y*1
6y + 3 + 8$y^{2}$ + 4y
8$y^{2}$ + 6y + 4y + 3
8$y^{2}$ + 10y + 3

Answer 2

(3+2xy) (xy+1), se x = 2

3xy +3 + 2x²y² +2xy
2x²y² + 3xy +2xy +3
2x²y² +5xy +3    

Substituindo:
2x²y² +5xy +3   
2.(2)².y² + 5.(2).y +3
2.4.y² +10y +3
8y² +10y +3