( 1)a=3？ C is not equal to -2? (2)a is not equal to 3 (3)a=-4/3

(1)m is not equal to-1, -7? (2)m 1=- 1？ m2=-7？ (3)m=- 13/3

Let (x0, y0) and substitute it into a1x0+b1y0+c1= a2x0+b2y0+C2 = 0? Multiply the former equation by λ, and then add the latter equation to get a1x 0+b1yo+c1+λ (a2x0+b2y0+C2) = 0.

( 1) ? 2X+3Y-2=0？ (2)4X-3Y-6=0