а) (3x + 9) * (4 - 6x) = 0Раскроем скобки:12 - 18x + 36x - 54 = 018x - 18 = 018x = 18x = 1
б) 4x - x + 4.22/3 = 63x + 4.22/3 = 63x = 6 - 4.22/33x = 4.78/3x = 1.59
в) |x| - 5 = 0|x| = 5x = 5 or x = -5
а) (3x + 9) * (4 - 6x) = 0
Раскроем скобки:
12 - 18x + 36x - 54 = 0
18x - 18 = 0
18x = 18
x = 1
б) 4x - x + 4.22/3 = 6
3x + 4.22/3 = 6
3x = 6 - 4.22/3
3x = 4.78/3
x = 1.59
в) |x| - 5 = 0
|x| = 5
x = 5 or x = -5