What can be said about line L1 and L2 Why What can be said a

What can be said about line L1 and L2? Why? What can be said about line L1 and L3? Why?

Solution

about lines if L1 and L2 are two lines of same slope then those two lines are parllel

let us say L1= a1 x +b1y +c=0 (here a1,b1,c are constants)

slope of L1 = -a1/b1

then line L2 = a2x+b2y+c1 =0 (here a2,b2,c1 are constants)

slope = -a2/b2

if -a1/b1 = -a2/b2

then L1 is parllel to L1

if slope of L1 * slope of L2 =-1

then two lines are perpendicular to each other

please give L1,L2and L3