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[tex]1000 x^{3} +y ^{3} =(10x+y)(... ^{2} -...........+.... ^{2} )=(...-...)(...+....+...)[/tex]

Răspuns :

[tex]1000x^3+y^3=(10x)^3+y^3=(10x+y)(100x^2-10y+y^2)[/tex]