Tìm x

Bài toán 3 : Tìm x biết.

a)4x(x + 1) = 8(x + 1) b) x(x – 1) – 2(1 – x) = 0

c) 2x(x – 2) – (2 – x)2 = 0 d) (x – 3)3 + 3 – x =0

e) 5x(x – 2) – (2 – x) = 0 g) 5x(x – 2000) – x + 2000 = 0

h)x2 – 4x = 0 k) (1 – x)2 – 1 + x = 0

m) x + 6x2 = 0 n) (x + 1) = (x + 1)2