A, √9X = 3 + √4X B, √4X2+12X+9 = 5 C, √1− X=3−√4+X

Câu5: Tìm x biết :

a,

9

x

= 3 +

4

x

b,

4

x

2

+12

x

+9

= 5 c,

1− x

=3−

4+

x