skróc misichel: xy+xz+3z+3y _____________ y²−z²+y+z

kropka: xy+xz+3z+3y _____________ y²−z²+y+z = 3(z+y)+x(y+z) −−−−−−−−−−−−−−−−−−−−− (y−z)(y+z)+(y+z) = (z+y)(3+x) −−−−−−−−−−−−−−−−−−−− (y+z)[(z+y)+1] = 3+x −−−−−−−−−− z+y+1

misichel: dziękuję