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5y = -4x + 9
y = x +
m1 =
Karena garis yang melalui (-3,3) tegak lurus 4x + 5y = 9 maka:
m1 x m2 = -1
x m2 = -1
m2 =
Persamaan garisnya:
y - y1 = m(x - x1)
y - 3 = 5/4 (x+3)
4y - 12 = 5x + 15
4y - 5x = 27
4u + 5y = 5u + 4y
4u + 5y = 5 (-3) + 4 (3)
4u + 5y = -15 + 12
4u + 5y = -3
.... koreksi lagi ya takut kliru rumus cepatnya aku....