Question

3) Calcule:



a) (a+2).(a+2)=

b) (3x+1).(3x-1)=

c) (x – 4).(x – 4)=​

Answer 1

Resposta:

Explicação passo-a-passo:

a) (a+2).(a+2)

= a^2 + 2a+2a + 2^2

= a^2+4a+ 4

_____________

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

= (3x)^2 - 1^2

= 9x^2 - 1

______________

c) (x – 4).(x – 4)

=​ X^2 - 4x - 4x + 16

= X^2 - 8x + 16