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PerSamaAn GaRisBentuk umum persamaan garis :
ax + by + c = 0
m = -b/a
y = mx + c
Syarat 2 garis saling tegaklurus :
m1 = -1/m2
Pasangan garis saling tegaklurus :
2x = y + 5 ---> y = 2x - 5 ---> m = 2
2x + y - 3 = 0 ---> m = -1/2
Tdk ada opsi yg memenuhi.
Kecuali opsi D, diubah 2x + y - 3 = 0
2x = y + 5 dan 2x + y - 3 = 0
atau
-2x = y + 5 dan 2x - y - 3 = 0