Question

4(x+3)-(0,5x+1)(2x+6)<6

Answer 1

4Х+12-1х^2+3+2х+6<6

4х+12-х^2-3+2х+6<6

х^2-6х+9<0

P=-6 , Q=9

х1+х2=6, х1=3

х1*х2=9, х2=3

ответ: (3;3)