Quadratic Equations

Quantitative Aptitude(IBPS RRB PO)

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Directions (): Following question contains two equations as I and II. You have to solve both equations and determine the relationship between them and give answer as,

I) x² + x – 12 = 0

II) y² + 2y – 15 = 0

x> y

x ≥ y

x = y or relationship can’t be determined.

x< y

x ≤ y

Explanation:

x² + x – 12 = 0
x² + 4x – 3x – 12 = 0
x(x + 4) – 3(x + 4) = 0
x = 3, -4
y² + 2y – 15 = 0
y² + 5y – 3y – 15 = 0
y(y + 5) – 3(y + 5) = 0
y = 3, -5
Relationship between x and y cannot be established.

By: Munesh Kumari

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