1x²+7x+126-16x-112=0,x≠-7x²-9x+14=0x1+x2=9 U x1*x2=14x1=2 U x2=72-4x²+7x+2=0D=49+32=81x1=(-7-9)/(-8)=2x2=(-7+9)/(-8)=-1/43(2m²+ym+12m²+36ym-2ym-12y²)/m(6m-2y)=(14m²+35ym-12y²)/m(6m-2y)4-x²-3x-9x-27-58=0,x≠-3x²+12x+85=0D=144-340=-196<0нет решения5(3z²-4z+6z-8+4z²+2z+8z+4)/((2x+4)(3z-4)=(7z²+12z-4)/(2z+4)(3z-4)