Jawabanmu

2014-06-03T12:05:01+07:00
Hasilnya ( 3x1/2, -8x1/2) = (1,5  -4)
2014-06-03T12:59:30+07:00
X' = 3 . 1/2 = 3/2
y' = -8 . 1/2 = -4
A'(3/2, -4)