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10 ecuații cu formula (a+b)^2=a^2+2•a•b+b^2
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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

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