Jawabanmu

Jawaban paling cerdas!
2014-02-09T18:29:01+07:00
1. X^2 +10x+7=0
   X^2 +10x = -7
  X^2 + 10x + 25 = -7+25
  (x+5)(x+5) = 18
  (x+5)^2 = 18
  x= 18/5

2. x^2-x-6 =0
x^2-x = 6
(x-1/2)^2 = 6 + (1/2)^2
(x-1/2)^2 = 25/4
x-1/2 = +-(plus minus) akar 25/4
x-1/2 = plus minus 5/2
x = 5/2-1/2 atau x = -5/2 -1/2
x=3 atau x=-2
makasih yaa
sama-sama
eh maaf, ralat, yang nomor 1 itu xnya -18/5 ya, bukan 18/5