Question

Garis melalui titik (2,5)dan tegak lurus dgn garis 2x+y+5=0

Answer 1

2x + y + 5 = 0
y = -2x - 5

m = -2 (koef.x)

krn tegak lurus
m1 × m2 = -1
-2 × m2 = -1
m2 = 1/2 mll (2,5)

gunakan rumus
y - y1 = m(x - x1)
y - 5 = 1/2 ( x -2)
kali 2 kdua ruas
2y - 10 = x -2
2y - 10 -x + 2 = 0
2y - x - 8 = 0

x - 2y + 8 = 0