garis ax + by = 1 dan y = 3x - 2 saling sejajar maka nilai a : b

jawab

ax +by = 1
by = - ax + 1
m1 = -a/b

y = 3x-2
m2 = 3/1

m1 = m2
-a/b = 3/1
-a = 3b
a = - 3b

a : b = - 3b : b
a : b = - 3 : 1