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vivian2020
27.11.2019 •
Biology
What is the description of a specific relationship under given conditions in the natural world known as ?
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Ответ:
If Δ > 0, you will have two real roots.
If Δ = 0, you will have one real root.
If Δ < 0, you will have two complex roots.
Why? Let's take a look at the quadratic equation:
(Assuming a, b, and c are all real)
See the discriminant inside the square root?
If it's positive, we'll be left with a real number.
If it's negative, what's inside the root is imaginary, and so our solution is complex.
If it's equal to 0, we only get one solution. (plus/minus 0 has no effect)
If the discriminant of a quadratic equation is 4, B) There are two real roots.