if ab is not equal to bc ,then prove that the equation (a sq+bsq)x sq +2(ac+bd)x+(csq+dsq)=0 has no real roots
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38 is the ans of this question
yooo3:
i don't think that is the answer
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ANSWER: Prisoner B.
EXPLANATION: If prisoners B and C had the same color hat on, prisoner A would have know immediately that his hat was the other color (there are only two hats of each color). Since prisoner A was silent, prisoners B and C must have different colored hats. Prisoner B realized this and knew that his hat was not the same color as prisoner C, therefore his hat must be black!
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EXPLANATION: If prisoners B and C had the same color hat on, prisoner A would have know immediately that his hat was the other color (there are only two hats of each color). Since prisoner A was silent, prisoners B and C must have different colored hats. Prisoner B realized this and knew that his hat was not the same color as prisoner C, therefore his hat must be black!
❌❌❌❌☝☝☝✌✌
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