If the roots of the equation x^2 + 3x + 2 = 0 are a and b, what is the value of

Practice Questions

Q1
If the roots of the equation x^2 + 3x + 2 = 0 are a and b, what is the value of a + b? (2022)
  1. -3
  2. 3
  3. 2
  4. 1

Questions & Step-by-Step Solutions

If the roots of the equation x^2 + 3x + 2 = 0 are a and b, what is the value of a + b? (2022)
  • Step 1: Identify the equation given, which is x^2 + 3x + 2 = 0.
  • Step 2: Recognize that this is a quadratic equation in the form of ax^2 + bx + c = 0.
  • Step 3: Identify the coefficients: a = 1, b = 3, and c = 2.
  • Step 4: Use the formula for the sum of the roots of a quadratic equation, which is -b/a.
  • Step 5: Substitute the values of b and a into the formula: -b/a = -3/1.
  • Step 6: Calculate -3/1, which equals -3.
  • Step 7: Conclude that the value of a + b (the sum of the roots) is -3.
  • Quadratic Equations – Understanding the properties of quadratic equations, specifically how to find the sum and product of the roots using Vieta's formulas.
  • Vieta's Formulas – Application of Vieta's formulas to determine relationships between the coefficients of a polynomial and its roots.
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