1. persamaan garis yg melalui titik (-5,3) dan sejajar garis y = 4x + 9 adalah... 2. persamaan garis yg melalui titik (2,-4) dan sejajar garis 3x + 5y -6 = 0 adalah...
ellavitamaria
1. ) m1 = m2 y - y1 = m ( x-x1) y = 4x +9 m= 4 y-3 = 4 ( x-(-5) y-3 = 4x +20 y= 4x +20+3 y = 4x + 23 y-4x = 23 -4x + y = 23 4x - y = -23
y - y1 = m ( x-x1)
y = 4x +9
m= 4
y-3 = 4 ( x-(-5)
y-3 = 4x +20
y= 4x +20+3
y = 4x + 23
y-4x = 23
-4x + y = 23
4x - y = -23
2.) 3x + 5y - 6 = 0
5y = -6 - 3x
y = -6 -3x
-5
y = 3
5
y-(-4) = 3 ( x - 2)
5
y+4 = 3 x -6
5 5 dikali (5)
5y +20 +3x -6
5y+3x = -6-20
5y+3x = -26
3x +5y = -26
sekian :) :) :)