Verified answer

Ответ:

1)[tex]a^{2} + 4a + 4 = (a + 2)^{2}[/tex]

2)[tex]9m^{2} - 6m + 1 = (3m - 1)^{2}[/tex]

3)[tex]b^{2} - 1,2b + 0,36 = (b-0,6)^{2}[/tex]