Question

Ajutor dau 50 de puncte​

Answer 1

1)  $x^{2} +2xy+y^{2}$

2) $a^{2} +2*5a+5^{2} =a^{2} +10a+25$

3) $49+14b+b^{2}$

4) $x^{2} -2xy+y^{2}$

5) $81x^{2} +72x+16$

6) $16a^{2} -32a+16$

7) $x^{2} +6xy+9y^{2}$

8) $x^{2} +6x+9$

9) $100-100z+25z^{2}$

10) $9t^{2} +6t+1$

11) 961

12) 4624