9y^2-(3+2y)^2= (3y)^2-(3+2y)^2= (3y-3-2y)(3y+3+2y)=
=(y-3)(5y+3).
(4-х)(4+х)-(4+х)^2>-8
16-х^2-(16+8х+х^2)>-8
16-х^2-16-8х-х^2>-8
-2х^2-8х+8>0
х^2+4х-4<0
D=16-4*4=0
x=-b/2a
x=-4/2
x=-2
1,2х+3,7-0,7=1,3х
1,2х-1,3х=0,7-3,7
-0,1х=-3
х=30
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