A) X2 – 10X 160 B) X2 – 11 – 26X 0 C) 2X2 7 – 4X 0

Bài 8: Tìm x biết:

a)

x

2

– 10

x

16

0

b)

x

2

– 11 – 26

x

0

c)

2

x

2

7 – 4

x

0