4 x 2 12 x 9
- 4 x 2 12 x 9 0
- 4 x2 12 x 9 x 4 2
- 4 * x y 2 12 x y 9
- 4x ^ 2 - 12x + 9 = 0 ke mul honge
- X 4 2 4x 12 x 4 3x 9
- 4 x 12 x 6 4 2 9
- 3 12 x )- 4 2 11 x )+ 9x
- 2 1 4 x 12 x 6 90 angle stack boot
- 9x 4 x 2 12x 36
- 9 12x 4 x 2 )= 6 2 (- x 3
- X 4 4x 2 12x 9 0
- 2x 7 2 4 x 9 )( x 9 )= 12x 13
- 4 x mũ 2 12x 9
- 4 x mũ 2 12x 9 0