Tìm x: a) (x^2 + x + 1).(x - 1) = x^2.(x - 9) + 2x - 3; b) 13 - (3x^2 + 5x - 8).(2x - 1) = (2x^2 - 3x + 1).(x + 3/8)

Tìm x:
a) (x^2 + x + 1).(x - 1) = x^2.(x - 9) + 2x - 3
b) 13 - (3x^2 + 5x - 8).(2x - 1) = (2x^2 - 3x + 1).(x + 3/8)
c) (2x + 4).(x^2 - 4x - 5) + 2x - 3 = 4x - 2.(x - 5).(x^2 + 3x + 2)