Răspuns:
1. (1+2)²= 1+2×2+2²=9
2. (3+6)²=3²+2×3×6+6²=81
3. (2+3)²=2²+2×2×3+3²=25
4. (9+11)²=9²+2×9×11+11²=400
5. (100+200)²=100²+2×100×200+200²=90000
6. (4+8)²=4²+2×4×8+8²=144
7. (10+12)²=10²+2×10×12+12²=484
8. (0+2)²=0+0+4=4
9. (-3+8)²=(-3)²+2×(-3)×8+8²=25
10. (-2+10)=(-2)²+2×(-2)×10×10²=64
