emmy83 emmy83
  • 01-12-2017
  • Mathematics
contestada

Find a polynomial of degree 2 with real number coefficients and zero 3-2i

Respuesta :

Аноним Аноним
  • 01-12-2017
Complex roots occur as conjugates so the other root is 3 + 2i

so we have  the factored form 

(x - (3 - 2i)(x - (3 + 2i)

= (x - 3 + 2i)(x - 3 - 2i)

= x^2 -3x - 2ix - 3x + 9 + 6i + 2ix - 6i- 4i^2

=  x^2 -6x + 9 + 4

= x^2 - 6x + 13   Answer
Answer Link

Otras preguntas

help help help help!
I have been stuck with this one, and i would like to how to solve this. In each case, determine whether line AB is parallel or perpendicular to CD. (a) A(0, 0),
Add and simplify 9/16 + 1/2= ?
Can someone help me with this whole page? Hurry it's due Monday!
How to find the area of a circle ?
How many 1/10 are in 3?
Can the sum of two mixed numbers be equal to 2 ? Explain why or why not.
Approximately how many miles apart are Petrograd and Moscow ? A. 200 B. 350 C. 500 D. 650
What is the percentage increase from 200 to 280
Can the sum of two mixed numbers be equal to 2 ? Explain why or why not.