1) [tex]x^{2} +2xy+y^{2}[/tex]
2) [tex]a^{2} +2*5a+5^{2} =a^{2} +10a+25[/tex]
3) [tex]49+14b+b^{2}[/tex]
4) [tex]x^{2} -2xy+y^{2}[/tex]
5) [tex]81x^{2} +72x+16[/tex]
6) [tex]16a^{2} -32a+16[/tex]
7) [tex]x^{2} +6xy+9y^{2}[/tex]
8) [tex]x^{2} +6x+9[/tex]
9) [tex]100-100z+25z^{2}[/tex]
10) [tex]9t^{2} +6t+1[/tex]
11) 961
12) 4624
