Pomnóż:
( - x )(3x+ )(x+1)
=3x^4+x^5-3x^2-x^3(x+1)=
=3x^5+x^6-3x^3-x^4+3x^4+x^5-3x^2-x^3=
=x^6+4x^5+2x^4-4x^3-3x^2
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=3x^4+x^5-3x^2-x^3(x+1)=
=3x^5+x^6-3x^3-x^4+3x^4+x^5-3x^2-x^3=
=x^6+4x^5+2x^4-4x^3-3x^2