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Verified answer
3x + 4y + 12 = 04y = -3x - 12
y = -3/4x - 3
m1 = -3/4
syarat tegak lurus
m1 . m2 = -1
-3/4 . m2 = -1
m2 = 4/3
melalui titik (2, -5)
y - y1 = m2(x - x1)
y - (-5) = 4/3(x - 2)
y + 5 = 4/3x - 8/3
-------------------------kedua ruas dikali 3
3y + 15 = 4x - 8
4x - 3y - 8 - 15 = 0
4x - 3y - 23 = 0
Verified answer
Tegak lurus gris 3x + 4y + 12 = 04x - 3y - {(4)(2) -3(-5)} =0
4x - 3y - 23 =0