• Numerical Ability - Quadratic Equations
Question

I. 821x2 - 757x2= 256 

II. √196 y3 - 12y3 = 16

  • A) if x > y
  • B) if x ≥  y
  • C) if x < y
  • D) if x ≤ y
  • E) if x = y or relationship cannot be established
Solution

Answer: (d)

Explanation:

64x2 = 256 …. (i)

or, x2  = 4

x = ± 2

14y3 – 12y 3 = 16 …. (ii)

or, 2y3 = 16

y3 = 8

y = 2

Hence x ≤ y

Answer: (d)

Explanation:

64x2 = 256 …. (i)

or, x2  = 4

x = ± 2

14y3 – 12y 3 = 16 …. (ii)

or, 2y3 = 16

y3 = 8

y = 2

Hence x ≤ y
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