Asked by XXX

For what real values of a does the quadratic 4x^2 + ax + 25 have nonreal roots? Give your answer as an interval.

Answers

Answered by Damon
when b^2 - 4 a c is negative

a^2 - 400 <0

-20 < a < +20
Answered by XXX
Please convert that to an interval!
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