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calculeaza: 2^2-2×2×(-3)+(-3^2)​

Răspuns :

[tex]2 ^{2} - 2 \times 2 \times ( - 3) + ( - 3 ^{2} ) = \ \\ \ = 4 - 4 \times ( - 3) + ( - 9) = \\ = 4 + 12 - 9 = \\ = 16 - 9 \\ = 7 [/tex]