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Sekolah Menengah AtasMatematika44 poin
Persamaan garis melalui titik potong garis x-3y-7=0 dan 3x+2y+12=0 sejajar terhadap garis menghubungkan garis (0,3) dan (5,-2) adalah?
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Titik potong
x - 3y -7 = 0 (x3) 3x - 9y -21 = 0
3x + 2y +12 = 0 (x1) 3x + 2y +12 = 0
-11y -33 = 0
11y = -33
y = -3
x - 3(-3) - 7 = 0
x + 9 - 7 = 0
x = -2
titik potong (-2,-3)
gradien = (3 + 2)/(0-5)
= 5/-5
= -1
y - (-3) = -1(x - (-2)
y + 3 = -x - 2
y = -x - 5
y + x + 5 = 0