Jawabanmu

2014-08-14T17:44:49+07:00
1. 2x^4 + 9x^3 + 5x^2 -5x
2. 6x^4 + 7x^3 - 12x^2 - 3x + 2
3. 2x^3 - 3x^2 - 19x^2 - 30
4. 6x^3 + 15x^2 -36x