2) a^2 - 18a + 81 - 1 + 4a^2 =
5a^2 - 18a + 80
X1=0,45
X2=0,15
X3=-0,15
X4= -0,45
X5= -0,75
X6= -1,05
Сумма 6: 0,45+0,15-0,15-0,45-0,75-1,05= -1,8
<span>1)16ab^2-5b^2c-10c^3+32ac^2 =16a(b</span>²+2c²)-5c(b²+2c²)=(b²+2c²)(16a-5c)<span>
2) -28ac+35c^2-10cx+8ax=-7c(4a-5c)+2x(4a-5c)=(4a-5c)((2x-7c)</span>