B. X2 – 7X + 10 = 0A. 7X2 – 28 = 0C. X3 + 3X = 3X2 + 1B. 23X X( 2− =4)...

4. Tìm x:

b. x

2

– 7x + 10 = 0

a. 7x

2

– 28 = 0

c. x

3

+ 3x = 3x

2

+ 1

b.

2

3

x x

(

2

− =

4

)

0