1) m^2+6m+9=?
2) p^2+6pq+9p^2=?
3) a^2b^2-4abc+4c^2=?

1) m^{2} +6m+9=(m+3)^ {2}
2) p^{2} +6pq+9 p^{2} = (p+39q)^{2}
3) a^{2} b^{2} - 4abc+4 c^{2} = (ab-2c)^ {2} [/tex]