Quadratic Equations

Quantitative Aptitude (CDS)

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What is sum of all integer values of n for which n² + 19n + 92 is a perfect square?

-19

Explanation:

n² + 19n + 92 = ( n² + 18n+ 81)+n + 11
To be perfect square n+11=0 => n= -11
also n² + 19n + 92 = n² + 20n+100 - n- 8
to be perfect square , n= -8
ATQ Sum = -11 -8 = -19

By: Munesh Kumari

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