Quadratic Equations

Quantitative Aptitude (SBI-PO)

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I. 3x² + 23x + 30 = 0

II. 3y² – 4y – 4 = 0

x > y

x < y

x ≥ y

x ≤ y

Explanation:

3x² + 23x + 30 = 0
3x² + 18x + 5x + 30 = 0
Gives x = -5/3, -6
3y² – 4y – 4 = 0
3y² – 6y + 2y – 4 = 0
Gives y = 2, -2/3
Put all values on number line and analyze the relationship
-6…. -5/3….. -2/3…… 2

By: Amit Kumar

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