a) (3a -2x)²

b) (x -7)²

c) (xy -p³)²

d) (x +7)²

e) (1 + 5m).(1 - 5m)²

Respostas

a) (3a -2x)²=

(3a -2x).(3a -2x)=

9a² -6xa -6xa +4x² =

9a² -12xa +4x²

b) (x - 7)²=

(x -7).(x -7)=

x² -7x -7x +14

x² -14x +49

c) (xy -p³)²=

(xy -p³).(xy -p³)=

x²y² -p³xy -p³xy +p^6=

x²y² -2p³xy +p^6

d) (x +7)²=

(x +7).(x +7)=

x² +7x +7x +49=

x² +14x +49

e) (1 + 5m)(1 - 5m)=

1 -5m + 5m -25m

1 -25m