Question

12.
The pair of lines represented by the equations 2x+y+3 = 0 and 4x+ky+6 =
O will be parallel if value of k is
OR
If the quadratic equation x² - 2x + k = 0 has equal roots, then value of k​

Answer 1

Answer:

if lines are parallel then their slope must be equal . slope of 2x+y+3 is -2

so slope of 4x+ky+6 must be -2

we get -4/k=-2

k=2

now second part if quadratic equation has equal roots then discriminant must be 0

4-4k=0

4=4k

k=1

hope it helps

vinay ♡♤

Answer 2

Answer:

Refer the attached picture.