Tìm x, biết: (3x - 1) ^ 2 - 25 = 0

Bài 2:

Tìm x, biết :

a) (3x - 1) ^ 2 - 25 = 0

b) 2x ^ 2 + x - 15 = 0

c) 3x ^ 2 - 12x ^ 2 * y ^ 2 + 3y ^ 2 + 6xy

d) (2x ^ 2 - 7x) - 4x + 14 = 0

e) x ^ 3 - 7x(x - 2) = 8

f) 3x(x - 1) = x ^ 2 - 2x + 1

g) x ^ 2 - 6x + 7 = 14

h) 3x ^ 2 = 4x