For the polynomial x^3 - 3x^2 + 3x - 1, what is the value of the sum of the root

Practice Questions

Q1
For the polynomial x^3 - 3x^2 + 3x - 1, what is the value of the sum of the roots? (2019)
  1. 1
  2. 3
  3. 0
  4. 2

Questions & Step-by-Step Solutions

For the polynomial x^3 - 3x^2 + 3x - 1, what is the value of the sum of the roots? (2019)
  • Step 1: Identify the polynomial given in the question, which is x^3 - 3x^2 + 3x - 1.
  • Step 2: Recognize that the polynomial is in the standard form ax^3 + bx^2 + cx + d, where a, b, c, and d are coefficients.
  • Step 3: From the polynomial, identify the coefficients: a = 1 (for x^3), b = -3 (for x^2), c = 3 (for x), and d = -1 (constant term).
  • Step 4: Use the formula for the sum of the roots of a polynomial, which is -b/a.
  • Step 5: Substitute the values of b and a into the formula: -(-3)/1.
  • Step 6: Simplify the expression: 3/1 = 3.
  • Step 7: Conclude that the sum of the roots of the polynomial is 3.
  • Vieta's Formulas – Vieta's formulas relate the coefficients of a polynomial to sums and products of its roots.
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