1)64x2-63x-1=0
64x2+x-64x-1=0
x×(64x+1)-(64x+1)=0
(64x+1)×(x-1)=0
64x+1=0
x-1=0
x=-1/64
x=1
Ответ:x=-1/64;x=1
2)
3x2+5x-2=0
3x2+6x-x-2=0
3x×(x+2)-(x+2)=0
(x+2)×(3x-1)=0
x+2=0
3x-1=0
x=-2x=1/3
Ответ сам
(x+3)(4-x)(x-2)≥0, (x+3)(х-4)(x-2)≤0
------------------- -3----------------------2----------------------4-------------------->x
- + - +
x∈(-∞;-3}∪[2;4]
Х * 215 - 4936 = 63 219
х * 215 = 63 219 + 4 936
х * 215 = 68 155
х = 68 155 : 215
х = 317
___________
317 * 215 - 4936 = 63 219
63 219 = 63 219