Question

If the equation
$x^{2} - (k+4) + 4(x+4) = 0$
Has repeated root find k

Answer 1

Answer:

For repeated roots, b

2

−4ac=0

Here, a=9,b=3k,c=4

∴(3k)

2

−4×9×4=0

or 9k2=4×9×4 or k=±4