question_answer

If the roots of the equation\[{{x}^{2}}-bx+c=0\]are two consecutive integers, then\[{{b}^{2}}-4c\]equals     AIEEE  Solved  Paper-2005

A) 1             

B) 2                             

C)        3                             

D)        -2

Correct Answer: A

Solution :

Letandbe the roots of Then,and             Note If the roots of the equation are consecutive integers, then the value of tois always 1.