Tìm x

a)   2x2 + 10x = 0

ó

b)   4x2 - 14x = 0

c)   (x - 3)2 - 5(x - 3) = 0

d)   (x +8)2 = 6(x + 8)

e)   (x - 4)(5x - 3) = (x - 4)(x + 2)