3-4х=4х²-3х-16х+12
-4х²-4х+3х+16х+3-12=0
-4х²+15х-9=0
Д=225-4*(-4)*(-9)= 81
х1= -15+9/-8= -6/-8= 3/4
х2= -15-9/-8= -24/-8= 3
3-4х=4х²-3х-16х+12
-4х²-4х+3х+16х+3-12=0
-4х²+15х-9=0
Д=225-4*(-4)*(-9)= 81
х1= -15+9/-8= -6/-8= 3/4
х2= -15-9/-8= -24/-8= 3