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m1.m2 = -1 (karena tegak lurus)
2/3.m2 = -1
m2 = -1/2/3
m2 = -3/2
persamaan garis :
y-y1 = m (x-x1 )
y-(-5) = -3/2 (x-(-3))
y+5 = -3/2 (x+3)
y+5 = -3/2x + -9/2
y = -3/2x+(-9/2)-5
y = -3/2x - 19/2
semuanya dikali 2 supaya penyebut 2 nya hilang persamaannya menjadi:
2y = -3x - 19
3x+2y+19 = 0
semoga membantu