(4х+3)²=(3х-2)(4х+1)
16х^2+24х+9=12х^2+3х-8х-2 16х^2+24х+9-12х^2-3х+8х+2=0 4х^2+29х+11=0 Д=b^2-4ac=(29)^2-4*4*11=841-176=665^2>0