Hello varunnayudu

Suppose thatd= pi+ qj+ rk. Then equate the coefficients ofi,jandkin vector products:

q - r = 3

2r - p = -8

p - 2q = 2

(Do you see where these equations come from?)

These equations are not all independent. You can't solve for p, q and r yet. But you also know thatd.a= 0. So you also have:

p + q - 2r = 0

Now you can solve for p, q and r.

Grandad