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Un article trouvé pour ce sujet.
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Factoring |
2012-09-10 |
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saravanan pose la question :
Dear Sir ,
I felt difficulty solving the following problem . So please help me .
a+b+c=7
ab+bc+cd= 20
what is a^2+b^2+c^2 ?
Lorraine Dame and Robert Dawson lui répond. |
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