Math, Pre Calc

posted by .

Given that (+-2) and i are the roots of a 4th degree polynomical, find the equation.

Please help! Thank you:)

  • Math, Pre Calc -

    complex roots come in pair, so -i is also a root

    f(x) = (x-2)(x+2)(x-i)x+i)
    = (x^2-4)(x^2+1)
    = x^4 - 3x^2 - 4

  • Math, Pre Calc -

    Thanks!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math23456

    Problem:4x^2y^3 Choices: a.2nd degree b.3rd degree c.4th degree d.5th degree What I think:I think it is letter C. It is degree 3 in y. It is degree 2 in x. Normally, one would call this a degree equation , or a cubic equation.
  2. Pre-Calc

    I am stuck solving this problem, any help please..Many thanks find all numbers x that satisfy the given equation ln(2x) ------- =2 ln(3x)
  3. Pre-Calculus/Trig Check please and help

    Could someone please check the first one and help me with the second one. I'm stuck-Thank you 1.What are theroots of the following polynomial equation?
  4. Pre-Calc/Trig

    Please help-I'm stuck really bad What are the roots of the equation x^2 - 4x + 3 = 0 I think I was suppose to use b^2 - 4ac so it would be -4 - (-4)*1*3 = 12 so the roots would be 12 and -12 Thank you for any help you can provide
  5. Pre-Calc-Please check my answer

    Please help-I'm stuck really bad Thank you for any help you can provide What are the roots of the equation x^2 -4x + 3 = 0 x^2 - 4x = 3 x^2 +2(-2)x + -2^2 = -3 = -2^2 x^2 + -4x + 4 = 1 (x + -2)^2 = 1 qrt (x+-2)^2 = sqrt 1 x+-2 = plus …
  6. Pre-Calc

    Can you show me how to find the rectangular equation of r=2costheta + 3 sin theta All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one …
  7. Math ( Pre Calc)

    Find all real and imaginary roots of the polynomial equation 3x^4-x^3+4x^2-2x-4=0
  8. Pre calculus

    Find all roots f(x)- x^3+2x^2-15x+30 Factor f(x) completely. I can't find any roots and always get a remainder with 1, -1, 2, -2 What do you do if you cannot find a root?
  9. Pre-Calc/Trig...

    Helpp needed, this is sort of confusing me. Describe the nature of the roots for this equation. 2x^2-x+1=0 A. Two real, rational roots B. Two real, irrational roots C. One real, double root D. Two complex roots
  10. Pre Calc

    Write an equation to a polynomial function that has the following properties: Fourth degree equation Lead coefficient is -2 Two negative real roots and one positive real root The positive real root has multiplicity of 2

More Similar Questions