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Grade: 11

                        

If both roots of the quadratic equation x 2 + 2 (k-1)x + (k + 5) = 0 are positive then possible integral values of ‘k’ are ​a) -5 b) -4 c) -3 d) -1 (Multiple answers correct) Please explain.

5 years ago

Answers : (4)

grenade
2061 Points
							
the question is based over location of roots
5 years ago
grenade
2061 Points
							
the answer is B C D
i will give the prood later
5 years ago
NITISH DESHPANDE
22 Points
							
So what are the correct options?
5 years ago
grenade
2061 Points
							
sum of the roots equals 2 (1-k)  and this should be grater than 0
secondly prodect of roots k + 5 should be greater than 0 hence there is only one value -5
which could not be substituted
approve if useful above too
5 years ago
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