The value of k for which the roots of the equation x^2+4x+k=0 are real is 1. k=4
2. k˂4
3. k˃4
4. k⦤4
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Step-by-step explanation:
if the roots are real then discriminant should be greater than 0
=> d>_0
=] b²-4ac > 0
=] 16- 4k > 0
=] 16 > 4k
4>k
thus,
option 4 k is less than equal to 4 is correct...
it is because when discriminant is equal to 0.
roots are still real ...
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