Diketahui garis P melalui titik 2,2 A.jika garis p sejajar dengan garis q : 5x +2y =2, tentukan persamaan garis q B.jika garis q tegak lurus dgn garis r yg melalui titik 0,0 dan 3,-9 tentukan persamaan garis p
LidyaPimchanok
A. sejajar arti nya sama m = -a / b -5/ 2 y - y1 = m (x -x1) y - 2 = -5/2 ( x-2) 2(y -2) = -5 (x +10) 2y -4 = -5x - 50 2y + 5x + 50 - 4 = 0 2y + 5x = 46
b. y - y1 : y2 - y1 = x - x1 : x2 - x1 y - 0/-9 -0 = x - 0/ 3-0 y-0/-9 = x - 0 / 3 3(y-0) = -9(x-0) 3y = -9x 3y + 9x = 0
m = -a / b
-5/ 2
y - y1 = m (x -x1)
y - 2 = -5/2 ( x-2)
2(y -2) = -5 (x +10)
2y -4 = -5x - 50
2y + 5x + 50 - 4 = 0
2y + 5x = 46
b. y - y1 : y2 - y1 = x - x1 : x2 - x1
y - 0/-9 -0 = x - 0/ 3-0
y-0/-9 = x - 0 / 3
3(y-0) = -9(x-0)
3y = -9x
3y + 9x = 0
m1 = -a / b
-9 / 3
m2 = 3/9