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tolong ditandai sebagai jawaban terbaik
>> syarat tegak lurus m1.m2 = -1
m2 = -2/3
>> pers grs melalui (6,-2) dn m2 :
y+2 = -2/3 (x-6)
3y + 6 = -2x + 12
3y +2x -6 = 0