The equation (a+2)x2+(a−3)x=2a−1, a≠−2 has rational roots for
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
all rational values of a except a = - 2
b
all real values of a except a= - 2
c
rational values of a> 1/2
d
none of these
answer is A.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
We find that: Sum of the coefficients= 0.Therefore, x = 1 is a rational root of the given equation.Let the other rational root be a. Then,Product of the roots =2a−1a+2⇒ α×1=2a−1a+2⇒α=2a−1a+2Clearly, a is rational for all rational values of a except -2.