X=(x-6)²
x=x²-12x+36
-x²+13c-36=0
-(x-9)(x-4)=0
(x-9)(x-4)=o
x-9=0. x-4=0
x=9 x=4
-√x→-4=-2
x-6→4-6=-2
-√x→-9=-3
x-6→9-6=3
ответ х=4
(16 1/2 - 13 7/9) * 18/33 + 2,2 * (8/33 - 1/11) + 2/11 = 2
1) 16 1/2 - 13 7/9 = 16 9/18 - 13 14/18 = 15 27/18 - 13 14/18 = 2 13/18
2) 2 13/18 * 18/33 = 49/18 * 18/33 = 49/33 = 1 16/33
3) 8/33 - 1/11 = 8/33 - 3/33 = 5/33
4) 2,2 * 5/33 = (2,2 * 5)/33 = 11/33
5) 1 16/33 + 11/33 = 1 27/33
6) 1 27/33 + 2/11 = 1 27/33 + 6/33 = 1 33/33 = 2
кажется,так...
----------------------------
................вот ответ
(х²-9)(1 - 8/х+3)=0
1) х²-9=0
(х-3)(х+3)=0
х-3=0 или х+3=0
х=3 х= -3
2) 1 - 8 / х+3 = 0
х+3-8 / х+3 = 0
ОДЗ: х+3≠0, х≠ -3
х+3-8=0
х-5=0
х=5
Ответ: х= 3; 5