Ask questions and get helpful answers.

Find the roots of the polynomial equation.

x^3 - 4x^2 + x + 26 = 0

A. 3 ± 2i, -2
B. -3 ± 2i, -2
C. 3 ± 2i, 2
D. -3 ± 2i, 2

Please help, I would appreciate it!

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩

2 answers

  1. Thank you!

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. From the choices, clearly you expect 2 or -2 to be a root. A little synthetic division yields
    (x+2)(x^2-6x+13)
    So it's either A or B
    Now use the quadratic formula to choose.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Answer this Question

Related Questions

Still need help?

You can ask a new question or browse existing questions.