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Quadratic Equations Questions

  • Numerical Ability - Quadratic Equations
Question

2x 2 − 15 = 7x

17y = −7 − 6y 2

  • A) if x > y
  • B) if x < y
  • C) if x ≥ y
  • D) if x ≤ y 
  • E) x = y or no realtion can be established
Solution

(e); 2x2 - 10x + 3x - 15 = 0

       2x(x - 5) + 3(x - 5) = 0

       x = -3/5, 5

       6y2 + 14y + 3y + 7 = 0

       2y(3y + 7) + 1(3y + 7)= 0

       y = -1/2, -7/3, no realtion can be established

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