Verified answer

Resposta:

a) (3+ x)² =

[tex]9+6x+x^{2}[/tex]

b) (x +1)² =

[tex]x^{2} +2x+1[/tex]

c) (3x +2)² =

[tex]9x^{2} +12x+4[/tex]

d) (2x +1)² =

[tex]4x^{2} +4x+1[/tex]

e) (a+ 4b)² =

[tex]a^{2} +8ab+16b^{2}[/tex]

f) (10x +y)² =

[tex]100x^{2} +20xy+y^{2}[/tex]

g) (3y + 3a)² =​

[tex]9y^{2} +18ay+9a^{2}[/tex]