SOLUTION: Hello! I am trying to solve the following for homework: Given that one zero of P(x)= x^3+3x^2+7x+85 is 1+4i, which is also a zero of P(x)? Show the work.... A) -1+4i

SOLUTION: Hello! I am trying to solve the following for homework: Given that one zero of P(x)= x^3+3x^2+7x+85 is 1+4i, which is also a zero of P(x)? Show the work.... A) -1+4i

Algebra.Com

Question 384258: Hello!
I am trying to solve the following for homework:
Given that one zero of P(x)= x^3+3x^2+7x+85 is 1+4i, which is also a zero of
P(x)? Show the work....
A) -1+4i B) 1-4i C) 4+i D) -4+i
Thanks
Jim
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Hint: If is a zero of a polynomial , then is also a zero (since complex zeros come in conjugate pairs).
RELATED QUESTIONS
Given that one zero of P(x) = x3 + 3x2 + 7x + 85 is 1 + 4i, which of the following is... (answered by venugopalramana)

Hello, I'm taking Calculus online and have a homework problem I'm having trouble with. (answered by Alan3354)

given the polynomial p(x) = x^4-2x^3-7x^2+18-18 If one zero of P is 1-i, find the... (answered by Seutip)

Hello! A polynomial P is given: P(x) = 2x^3 + 7x^2 + 4x - 4 Find all the real... (answered by jim_thompson5910)

Hello! I am trying to solve the following for homework. I am really struggling with... (answered by rfer)

for the following function, one zero is given. find the other zeros.... (answered by Earlsdon)

Hello: I have a question about the following problem: 2x^3-3x^2-3x-5=0 I was... (answered by venugopalramana)

Hello, I am trying to solve the following equation for x: 15x/4 = 9/4 + x-3/2... (answered by MathLover1,MathTherapy)

Hello, I am working with functions just substituting and solving problems. The given is... (answered by josgarithmetic,jim_thompson5910)