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(21x³ -14x² + 7x) : (-7x) + (x-1)(x+2)

Răspuns :

(21x³ -14x² + 7x) : (-7x) + (x-1)(x+2)=
=-3x² +2x -x + x²-x+2x-2=
=-2x² +2x-2=-2(x²-x+1)

(21x³ -14x² + 7x) : (-7x) + (x-1)(x+2)=-3x² +2x -x + x²-x+2x-2=-2x² +2x-2=-2(x²-x+1)