perplexus.info :: Probability : Only real x counted

Only real x counted (Posted on 2017-03-01)

Let a and b be chosen at random from {0,1,2,3,4,5,6,7,8,9}.

Find the probability that x^2 + ax + b^2 = 0 will have
at least one real solution.

No Solution Yet Submitted by Ady TZIDON

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re: solution (spoiler)

Comment 3 of 3 |

(In reply to solution (spoiler) by Charlie)

I stand corrected. Charlie is correct.

b <= 2a, not sqrt(a)

Posted by hoodat on 2017-03-12 00:23:57

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