Jawabanmu

2014-09-07T20:55:43+07:00
5. 1 - x + 1 = 1
6. 2y^2z * 3x^2y = 
    6x^2y^3z
7. (2x - 1) (x^2 - 2x + 4)
    2x(x^2 - 2x + 4) - 1(2x^2 - 2x + 4)
    2x^3 - 4x^2 + 8x - 2x^2 - 2x + 4
    2x^3 - 4x^2 - 2x^2 + 8x - 2x + 4
    2x^3 - 6x^2 + 6x - 4