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m1 = 2/3 karna tegak lurus m2 = -1/m1 = -1/2/3 = -3/2
Pers garis melalui (-3,1)
( y - y1 ) = m ( x -x1)
( y - 1 ) = -3/2 ( x - (-3))
( y -1 ) = -3/2 ( x + 3 ) -----------x 2
2 ( y -1 ) = -3 ( x + 3 )
2y - 2 = -3x - 9
3x + 2y -2 + 9 = 0
3x + 2y + 9 = 0
3x + 2y = -9