1.
x²+2=x+2
x²-x+2-2=0
x²-x=0
x(x-1)=0
x=0 x-1=0
x=1
Ответ: 0; 1.
2.
b - 2a * a²-b² = b - 1 * (a-b)(a+b) = b - a+b =2b-a-b = b-a
a-b 4a a-b 2 2 2 2
3.
{8-x>9
{4+6x<1<br>
8-x>9
-x>9-8
-x>1
x<-1<br>
4+6x<1<br>6x<1-4<br>6x<-3<br>x<-0.5<br>
{x<-1<br>{x<-0.5<br>\\\\\\\\\
--------- -1 --------- -0.5 --------------
\\\\\\\\\\\\\\\\\\\\\\\\\
x<-1 или х∈(-∞; -1)