4(2x²+х)-3(х+3)=12х-12
8x²+4х-3х-9=12х-12
8x²+х-9-12х+12=0
8x²-11+3=0
а=8; b= -11; с=3
Д=b²-4ac= (-11)²-4*8*3= 25
х1,2= -b±Д / 2а
х1= 11+5 / 16= 1
х2= 11-5 / 16= 3/8
4(2x²+х)-3(х+3)=12х-12
8x²+4х-3х-9=12х-12
8x²+х-9-12х+12=0
8x²-11+3=0
а=8; b= -11; с=3
Д=b²-4ac= (-11)²-4*8*3= 25
х1,2= -b±
Д / 2а
х1= 11+5 / 16= 1
х2= 11-5 / 16= 3/8