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stie careva cum se face asta: x³-3x²-10x=[x plus a] · [x plus b] · [x plus c]


Răspuns :

x(x² -3x -10)= x(x² +2x - 5x - 10) = x[x(x+2) - 5(x+2)] = x(x+2)(x-5)
a = 0 ; b = 2; c = - 5