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Sum of roots

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Sum of roots

by gmatblood » Wed Nov 02, 2011 1:43 pm
A: x2 + 6x - 40 = 0
B: x2 + kx + j = 0

Which is larger, the sum of the roots of equation A or the sum of the roots of equation B?
1)j = k
2)k is negative
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Source: — Data Sufficiency |
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by neelgandham » Wed Nov 02, 2011 2:14 pm
Sum of roots of equation A = -6
Sum of roots of equation B = -K

1)j = k - Insufficient !
2)k is negative => -k > 0 => -k >-6 So, Sum of roots of equation B > Sum of roots of equation A Sufficient !

IMO B
Anil Gandham
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