1. (x+3)^2
2. (x+5)^2
3. (y+4)^2
4. (z+7)^2
5. (a+b)^2
6. (m+10)^2
7. (r+8)^2
8. (s+9)^2
9. (n+2)^2
10. (r+11)^2
1.x^2+6x+9 2.x^2+10x+25 3.y^2+8y+16 4.z^2+14z+49 5.a^2+2ab+b^2 6.m^2+20m+100 7.r^2+16r+64 8.s^2+18s+81 9.n^2+4n+4 10.r^2+22r+121