Toán Lớp 10: Chứng minh: 3x^2+3x+3 chia hết cho 3
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Toán Lớp 10: Chứng minh: 3x^2+3x+3 chia hết cho 3
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3{x^2} + 3x + 3\\
= 3.\left( {{x^2} + x + 1} \right) \vdots 3
\end{array}$