For the lines represented by the equation 5x^2 + 6xy + 5y^2 = 0, what is the sum

Practice Questions

Q1
For the lines represented by the equation 5x^2 + 6xy + 5y^2 = 0, what is the sum of the slopes?
  1. -6/5
  2. 0
  3. 6/5
  4. 1

Questions & Step-by-Step Solutions

For the lines represented by the equation 5x^2 + 6xy + 5y^2 = 0, what is the sum of the slopes?
Correct Answer: -6/5
  • Step 1: Identify the equation given, which is 5x^2 + 6xy + 5y^2 = 0.
  • Step 2: Recognize that this is a quadratic equation in two variables (x and y).
  • Step 3: Identify the coefficients in the equation: the coefficient of x^2 is 5, the coefficient of xy is 6.
  • Step 4: Use the formula for the sum of the slopes of the lines represented by the equation, which is - (coefficient of xy) / (coefficient of x^2).
  • Step 5: Substitute the values into the formula: - (6) / (5).
  • Step 6: Simplify the expression to get -6/5.
  • Step 7: Conclude that the sum of the slopes is -6/5.
  • Quadratic Equations – Understanding how to analyze and manipulate quadratic equations in two variables.
  • Slope of Lines – Knowing how to derive slopes from the coefficients of a quadratic equation.
  • Sum of Slopes – Calculating the sum of slopes of lines represented by a quadratic equation.
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