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Solution 2.1:1b

From Förberedande kurs i matematik 1

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Revision as of 08:30, 9 September 2008

When the factor xy is multiplied by the expression inside the brackets, 1+x+x2, the distributive rule gives that all three terms 1, x and −x2 are multiplied by xy;

(1+x−x2)=1xy+xxy−x2xy=xy+x2y−x3y

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