Quadratic Equations

Quantitative Aptitude ( CCS)

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I. 3x² + 4x – 39 = 0

II. 3y² – 5y – 78 = 0

x < y

x ≥ y

x ≤ y

x = y or relation cannot be established

Explanation:

3x² + 4x – 39 = 0
3x² – 9x + 13x – 39 = 0
Gives x = -13/3, 3
3y² – 5y – 78 = 0
3y² – 18y + 13y – 78 = 0
Gives y = -13/3, 6
Put all values on number line and analyze the relationship
-13/3…. 3…. 6

By: Amit Kumar

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