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4x+2y-5 = 0
m = -a/b = -4/2 = -2
syarat tegak lurus
m₁×m₂ = -1
m₁×(-2) = -1
m₁ = -1/-2 = 1/2
persamaan garis lurusnya
y-y₁ = m(x-x₁)
y-(-3) = 1/2(x-2)
y+3 = 1/2(x-2)
2(y+3) = 2[1/2(x-2)]
2y+6 = 1(x-2)
2y+6 = x-2
-x+2y+6+2 = 0
-x+2y+8 = 0
maaf ya kalo salah