Jawabanmu

2014-04-09T00:56:27+07:00
a. x^2 - 5x = 24
   x^2 - 2 . 5/2 . x + (5/2)^2 = 24 + (5/2)^2
   (x - 5/2)^2 = 24 + 25/4
   
(x - 5/2)^2 = 121/4
   x - 5/2 = +- 11/2
   x = 8 dan x = -3