Ask a New Question

Question

how do I find a 4th degree polynomial that has zeros; i,3i with f(-1)=60

I know the conjucants are -i and -3i

(x-i)(x-3i) (x+i)(x=3i)
12 years ago

Answers

Steve
So, multiply it out to get

f(x) = a(x^2+1)(x^2+9) = a(x^4+10x^2+9)

Now, f(-1) = a(1+10+9) = 20a, so we need a=3 and thus

f(x) = 3(x^4+10x^2+9)

BTW, that's "conjugates"
12 years ago

Related Questions

What is the third–degree polynomial function such that f(0) = –18 and whose zeros are 1, 2, and 3 find the 6th degree Taylor polynomial for f(x)=cosx centered at pi/2 Suppose f(x) is a degree 8 polynomial such that f(2^i)=1/2^i for all integers 0≤i≤8. If f(0)=a/b, wh... Based on the degree of the polynomial f(x)=(x−1)^3(x+7), what is the greatest number of zeros it cou... Based on the degree of the polynomial f(x)=(x−1)3(x+7) , what is the greatest number of zeros it... Based on the degree of the polynomial f(x)=(x−1)3(x+7) , what is the greatest number of zeros it cou... Based on the degree of the polynomial f(x)=(x-1)^3(x+7), what is the greatest number of zeros it cou... Based on the degree of the polynomial f(x)=(x-1)^3(x+7) what is the greatest number of zeros it coul... Based on the degree of the polynomial f(x)=(x−1)3(x+7) , what is the greatest number of zeros it... We can use the degree of a polynomial to determine the number of turning points it can have. The num...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use