Jawabanmu

2014-06-09T11:56:36+07:00
1. x² + x = 72
   x² + x - 72 = 0
   (x + 9)(x - 8) = 0
   x = -9  v  x = 8
2. x² - 64 = 0
    x² = 64
    x = +/- 8
    x = - 8  v  x = 8
3. 6x² - 11x + 3 =0
   (3x - 1)(x - 3) = 0
   x = 1/3  v  x = 3 
2014-06-09T13:18:56+07:00
Reyrhjg dia hebat dan cerdas indonesia bangga padaamu