Question

7) Resolva os produtos notáveis
a) (x - 5)2 =
d) (2x + 4y )2 =
g) (4x+ 1)2 =
j) (3x + 1).(3x + 1) =
b) ( 3x - 1)2 =
e) ( 3x - 2a )2 =
h) (3x – 1). (3x + 1)=
l) (x – 4).(x – 4) =

Answer 1

A - (x - 5).(x - 5)

= x^2 - 5x - 5x + 25

= x^2 - 10x + 25

D - (2x + 4y ).(2x + 4y )

= 4x + 16xy + 16xy

= 4x + 32xy + 16y

G - (4x + 1).(4x + 1)

= 16x + 4x + 4x + 1

= 16x + 8x + 1

J - (3x + 1).(3x + 1)

= 9x + 3x + 3x + 3

= 9x + 6x + 3

B - (3x - 1).(3x - 1)

= 9x - 3x - 3x + 1

= 9x - 6x + 1

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

= 9x - 6xa - 6xa + 4a

= 9x - 12xa + 4a

H - (3x – 1).(3x + 1)

= 9x + 3x - 3x - 1

= 9x - 1

I - (x – 4).(x – 4)

= x^2 - 4x - 4x + 16

= x^2 - 8x + 16