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= y+4 / -2+4 = x+5 / 0+5
= y+4 / 2 = x+5 / 5
= 2(x+5) = 5(y+4)
= 2x + 5 = 5y + 20
= 2x = 5y + 20 - 5 (pindah ruas)
= 2x = 5y + 15 = garis yang tegak lurus dengan (-2,1)
gradien = 2x + -5y = 15 = 2/5
y-y1= -1/m(x-x1)
y- 1= -5/2 (x- (-2))
y- 1= -5/2x - 10/2 (semuanya dikali 2)
2y - 2= -5x - 10
2y = -5x - 10 + 2 (pindah ruas)
2y = -5x - 8
selesaii