Let's denote the elements of \( B \) as follows:
\[ b_1 = 1 + x^2 \]
\[ b_2 = x + x^2 \]
\[ b_3 = 1 + 2x + x^2 \]
We need to find constants \( c_1, c_2, c_3 \) such that:
\[ p(x) = c_1 b_1 + c_2 b_2 + c_3 b_3 \]
Substituting the expressions for \( b_1, b_2, b_3
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