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cum se elibereaza de paranteze
x(x+2)(x-3)=0


Răspuns :

x(x^2-3x+2x-6)=0
x(x^2-x+6)=0
x^3-x^2+6x=0

x''+2x+x'''-3x''+2x-6=0
x'''-2x''+4x-6=0