A) 2X3 – 7X2 + 5X = 0 ; B) 2X3 – X2 – 6X + 3 = 0 ; C) X4 + X3 – 2X...

Bài 1:

a) 2x

3

– 7x

2

+ 5x = 0 ; b) 2x

3

– x

2

– 6x + 3 = 0 ;

c) x

4

+ x

3

– 2x

2

– x + 1 = 0 ; d) x

4

= (2x

2

– 4x + 1)

2

.