у=1,2(2 х+1)

у(-12)
у(3)
у(2,1)

-12=1,2*(2х+1)-12=2,4х+1,2-12-1,2=2,4х-13,2=2,4х-13,2/2,4=х-5,5=х3=1,2*(2х+1)3=2,4х+1,23-1,2=2,4х1,8=2,4х1,8/2,4=х0,75=х2,1=1,2*(2х+1)2,1=2,4х+1,22,1-1,2=2,4х0,9=2,4х0,9/2,4=хх=0,375