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Question: Answered & Verified by Expert
Consider the equation x2+2x-n=0, where nN and n5, 100. The number of different values of n so that the given equation has integral roots, is
MathematicsQuadratic EquationJEE Main
Solution:
2599 Upvotes Verified Answer
The correct answer is: 8

x2+2x-n=0; n5, 100
D will be a perfect square,

 D=4+4n=41+n
1+n is a perfect square
1+n=9, 16, 25, 36, 49, 64, 81, 100
n=8, 15, 24, 35, 48, 63, 80, 99
Therefore, 8 values are possible.

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