TÌM X, BIẾT A) (X – 2)2 – (X – 3)(X + 3) = 6 . B) 4(X – 3)2 – (2X –...

Bài 1: Tìm x, biết

a) (x – 2)

2

– (x – 3)(x + 3) = 6 . b) 4(x – 3)

2

– (2x – 1)(2x + 1) = 10

c) (x – 4)

2

– (x – 2)(x + 2) = 6. d) 9 (x + 1)

2

– (3x – 2)(3x + 2) = 10

f)

2x

2

720

g)

x x

3

x

2

 5 0

.

h)

x

2

6x0

i)

2x

3

5x

2

12x0

Dạng 5: Các bài toán tổng hợp:

 