Question

Let `l` be a line described by equation ax+by+c=0 and let `P(x,y)` be a point not on `l`. Express the distance, `d` between `l and P` in terms of the coefficients `a, b and c` of the equation of line?

Answer 1

See below.

Explanation:

https://socratic.org/questions/let-l-be-a-line-described-by-equation-ax-by-c-0-and-let-p-x-y-be-a-point-not-on--1#336210