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Romashka [77]
4 years ago
6

Give an example of a quadratic with complex roots. Explain how you know it has complex roots.

Mathematics
1 answer:
Vladimir [108]4 years ago
5 0
2x^2 + x + 3=0 has only complex roots.

The determinant is 1-4*2*3 = -23

-23 (or any determinant) is the part under the square root sign,  If that determinant is negative, knowing you cannot take the square root of a negative number, we know the answers must be complex.
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