阿摩線上測驗
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3. (15%) Let P2 be the set of all polynomials with degree less than equal to 2. For any p1(x), p2(x) 
P2, their inner product is defined by
Let W = {1, x} and p(x) = x2. Find the unique polynonials
such that p(x)=q(x)+r(x).