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2(x+3)^2 metoda de rezolvare​

Răspuns :

[tex]2(x + 3) {}^{2} = 2( {x}^{2} + {3}^{2} ) = \\ = 2( {x}^{2} + 9) = 2x {}^{2} + 2 \times 9 = \\ = 2x {}^{2} + 18[/tex]

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