A) (2X – 5)2 = (X – 2)2 B) (X1)(2 X) (3 X5)(X2)4X2 1 C) X3 17X0D) 9X4X3

bài 3. - DE KIEM TRA TIET 21 DAI SO
DE KIEM TRA TIET 21 DAI SO

Bài 3. Tìm x, biết:

a) (2x – 5)

2

= (x – 2)

2

b)

(x1)(2 x) (3 x5)(x2)4x

2

1

c)

x

3

17x0

d)

9x4x

3