Jawabanmu

2014-04-20T11:21:24+07:00
2x+6y-12=0 tegak lurus dengan (-4,-2)
caranya ditukar 
2x+6y-12=0
6x-2y=(6 X -4) - (2 X -2)
6x-2y= -24 - (-4)
6x-2y= -24+4
6x-2y= -20
6x-2y+20=0
atau 3x-y+10=0


3 2 3
2014-04-20T11:38:55+07:00
Bx - ay = bx1 - ay1 = 6x - 2y = 6(-4) - 2(-2) = 6x - 2y = -24 + 4 = 6x - 2y = -20 = 6x - 2y + 20 = 0