Question

Find k for the following equation to have real and equal roots.

$k {x}^{2} + 4x + 1 = 0$
Pls explain.

⚠ Spammers not allowed ⚠​

Answer 1

If the roots are real and equal

b^2 -4ac>0

let a=k,b=4,c=1

b^2-4ac=0

4^2-4kx1=0

16-4k=0

-4k=-16

k=4

hope it help