Question

Jika gradien garis p(x-3y)-(p+12)y-8+3p=0 adalah -1/2, nilai P=

Answer 1

P(x - 3y) - (p + 12)y - 8 + 3p = 0
px - 3py - p - 12y - 8 + 3p = 0
px - (3p + 12)y + 2p - 8 = 0
(3p + 12)y = px + 2p - 8
y = px/(3p + 12) + (2p - 8)/(3p + 12)

m = - 1/2
p/(3p + 12) = - 1/2
2p = - 3p - 12
5p = - 12
p = - 12/5