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How many real and imaginary roots does the equation y2=x3-4x have

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in Cryptograph & Network Security by (60.1k points)
How many real and imaginary roots does the equation y2=x3-4x have

(a) 2 real, 1 imaginary

(b) all real

(c) all imaginary

(d) 2 imaginary, 1 real

The question was posed to me during an internship interview.

My question is taken from Elliptic Curve Arithmetic/Cryptography topic in portion Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

1 Answer

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Best answer
Right answer is (b) all real

For explanation: On solving the equation we get all real roots.

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