TÌM X BIẾTA) X( X-2 ) + X - 2 = 0H) 2 (3 5) (5 3 ) 0 X X    X B)...

Bài 4 : Tìm x biết

a) x( x-2 ) + x - 2 = 0

h) 2 (3 5) (5 3 ) 0 x x    x

b) 5x( x-3 ) - x+3 = 0

c) (3x + 5)(4 – 3x) = 0

d) 3x(x – 7) – 2(x – 7) = 0

e) 7x

2

– 28 = 0

f) (2x + 1) + x(2x + 1) = 0

g) 2x

3

– 50x = 0