Jawapan

2015-10-17T23:09:02+08:00
3x^2 = 2(x -1) +7
3x^2 = 2x -2 +7
3x^2 = 2x +5
3x^2 -2x -5 = 0
(3x -5)(x +1) = 0

3x -5 = 0
3x = 5
x = 5/3

x +1 = 0
x = -1
2015-10-17T23:21:39+08:00
3x^2 = 2x-2+7
3x^2 - 2x - 5 = 0
(x+1)(3x-5) = 0

x=-1   or   x= 5/3
macam mana dapat 13/5..?
eh saya salah salin. sbb saya buat kat kertas dulu. thanks for ask
eh takpe