For the lines represented by the equation 3x^2 - 2xy + y^2 = 0 to be parallel, t

Practice Questions

Q1
For the lines represented by the equation 3x^2 - 2xy + y^2 = 0 to be parallel, the condition is:
  1. 3 + 1 = 0
  2. 3 - 1 = 0
  3. 2 = 0
  4. None of the above

Questions & Step-by-Step Solutions

For the lines represented by the equation 3x^2 - 2xy + y^2 = 0 to be parallel, the condition is:
  • Step 1: Understand that the equation 3x^2 - 2xy + y^2 = 0 represents a conic section, which can include lines.
  • Step 2: Recognize that for the lines to be parallel, the determinant of the coefficients of the quadratic terms must equal zero.
  • Step 3: Identify the coefficients from the equation: A = 3, B = -2, C = 1.
  • Step 4: Write the determinant formula for the coefficients: D = B^2 - 4AC.
  • Step 5: Substitute the values into the determinant formula: D = (-2)^2 - 4(3)(1).
  • Step 6: Calculate the determinant: D = 4 - 12 = -8.
  • Step 7: Since the determinant is not zero, the lines are not parallel. For them to be parallel, set D = 0 and solve for the condition.
  • Quadratic Equations – Understanding how to analyze and manipulate quadratic equations to determine the nature of their roots.
  • Parallel Lines – Recognizing the condition for lines to be parallel, which involves the relationship between their slopes.
  • Determinants – Using determinants to find conditions for the existence of parallel lines in a system of equations.
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