Answer:
k ∈ (-∞,4]
Step-by-step explanation:
For the roots of the quadratic equation to be real D≥0
D = b² - 4ac
D = 16 - 4k
To roots to be real D≥0
16 - 4k≥0
-4k≥-16
4k≤16
k≤4
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Answers & Comments
Answer:
k ∈ (-∞,4]
Step-by-step explanation:
For the roots of the quadratic equation to be real D≥0
D = b² - 4ac
D = 16 - 4k
To roots to be real D≥0
16 - 4k≥0
-4k≥-16
4k≤16
k≤4