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Kelas 8 MatematikaBab Persamaan Garis
ax + by = c, tegak lurus, (p, q)
bx - ay - (bp - aq) = 0
2x - y + 5 = 0, tegak lurus, (3, -1)
-x - 2y - (-1 . 3 - 2 . (-1)) = 0
-x - 2y - (-3 + 2) = 0
-x - 2y - (-1) = 0
x + 2y - 1 = 0