(a-a²)²-a²(a-2)(a+2)+2a(7+3a²)=(a-a²)²-a²(a²-4)+2a(7+3a²<span>)=
=a</span>²-2a³+a⁴-a⁴+4a²+14a+6a³=4a³+5a²+14a=a(4a²+5a+14)
Х=-3 у=2 ⇒ у=-(2/3)х ................................................................................
12x+6-5=12x +1 (O_o) bkablabalbamaban
3-2х>=8x-1
-2x-8x = -1 - 3
-10x = -4
x= 0,4