If the equation x^2 + px + q = 0 has roots 2 and 3, what is the value of p?

Practice Questions

Q1
If the equation x^2 + px + q = 0 has roots 2 and 3, what is the value of p?
  1. -5
  2. -6
  3. -7
  4. -8

Questions & Step-by-Step Solutions

If the equation x^2 + px + q = 0 has roots 2 and 3, what is the value of p?
  • Step 1: Understand that the equation x^2 + px + q = 0 is a quadratic equation.
  • Step 2: Recognize that the roots of the equation are given as 2 and 3.
  • Step 3: Recall Vieta's formulas, which relate the coefficients of the polynomial to the sums and products of its roots.
  • Step 4: According to Vieta's formulas, the sum of the roots (2 + 3) is equal to -p.
  • Step 5: Calculate the sum of the roots: 2 + 3 = 5.
  • Step 6: Set up the equation: -p = 5.
  • Step 7: Solve for p by multiplying both sides by -1: p = -5.
  • Vieta's Formulas – Vieta's formulas relate the coefficients of a polynomial to sums and products of its roots.
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