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\frac{1}{9}a^{2}-ab+\frac{9}{4}b^{2}
Utilitzeu el teorema del binomi \left(p-q\right)^{2}=p^{2}-2pq+q^{2} per desenvolupar \left(\frac{1}{3}a-\frac{3}{2}b\right)^{2}.
\frac{1}{9}a^{2}-ab+\frac{9}{4}b^{2}
Utilitzeu el teorema del binomi \left(p-q\right)^{2}=p^{2}-2pq+q^{2} per desenvolupar \left(\frac{1}{3}a-\frac{3}{2}b\right)^{2}.