Jawabanmu

2014-02-20T16:27:22+07:00
(x-2/7)(x+1)=0
 x^{2}+5/7x-2/7 =0
Jawaban paling cerdas!
2014-02-20T16:31:31+07:00
Agak ragu deh....

x1 = 2/7 ⇒ (7x - 2) = 0
x2 = -1 ⇒ (x +1) = 0
jadi,
(7x - 2)(x + 1) = 0
7x^{2} +5x-2 = 0
3(2x+1)-5(x-1)=0
3(2x+1)-5(x-1)=0
jawabanya x +8 = 0
tapi caranya gmana aku kurang ngerti ka
lewat pesan ya