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Algebra Level 2

x 2 − 123 x + 456789 = 0 \large x^2 - 123x + 456789 = 0

Given that the equation above has no real roots. Which of the following options is correct?

12 3 2 − 4 ( 456789 ) < 0 123^2 - 4(456789) < 0 12 3 2 − 4 ( 456789 ) = 0 123^2 - 4(456789) = 0 12 3 2 − 4 ( 456789 ) > 0 123^2 - 4(456789) > 0

Chung Kevin by Chung Kevin , 45, Australia

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1 solution

Johnny Jillky
Mar 20, 2016

b^2 - 4ac must be negative for the square root to become imaginary

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