If the quadratic equation ax^2 + bx + c = 0 has roots p and q, which of the foll

Practice Questions

Q1
If the quadratic equation ax^2 + bx + c = 0 has roots p and q, which of the following is correct?
  1. p + q = -b/a and pq = c/a
  2. p + q = b/a and pq = -c/a
  3. p + q = c/a and pq = -b/a
  4. p + q = -c/a and pq = b/a

Questions & Step-by-Step Solutions

If the quadratic equation ax^2 + bx + c = 0 has roots p and q, which of the following is correct?
  • Step 1: Understand that a quadratic equation is in the form ax^2 + bx + c = 0.
  • Step 2: Identify the coefficients a, b, and c in the equation.
  • Step 3: Recognize that the roots of the equation are the values of x that make the equation equal to zero.
  • Step 4: Learn about Vieta's formulas, which relate the coefficients of the polynomial to the sums and products of its roots.
  • Step 5: According to Vieta's formulas, the sum of the roots p and q is given by the formula -b/a.
  • Step 6: Also, according to Vieta's formulas, the product of the roots p and q is given by the formula c/a.
  • Step 7: Conclude that if you know the coefficients a, b, and c, you can find the sum and product of the roots using these formulas.
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