Question

For what value of k, the roots of the equation x2+4x+k=0 are
real?
​

Answer 1

Given eq : x²+4x+k = 0

For real roots .

D>0

b²-4ac>0

4²-4.1.k>0

16-4k>0

-4k>-16

k>4

For the given eq have real roots k should be greater than 4

Answer 2

For a Quadratic Equation ax^2+bx+c=0 to have real roots

b^2−4ac≥0

⟹b^2≥4ac

⟹16≥4k

⟹k≤4

Mark this answer brainliest because this answer is fully right