Jawapan

2016-06-21T03:17:48+08:00
 \frac{x + (-3)}{2}  \frac{y+12}{2} ) = (2,9)
 \frac{x-3}{2} = 2 \frac{y+12}{2} = 9
x = 7, y =6
∴ P (7,6)