Jawapan

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  • Bercita-cita tinggi
2016-02-11T11:18:05+08:00
Titik tengh
= ( x1-x2 )/2 , ( y1-y2)/2
titik tengah = (1,6)
1 = ( x + 3 ) / 2
2 = x + 3
[email protected] = -1
6 = (y-1)/2
12 = y - 1
[email protected] = 13
(m,n) = (-1 ,12)