Posted by **cole** on Tuesday, April 27, 2010 at 9:04pm.

which function below, if either, has zeros that are complex conjugates?

P(x)= X^4-7x^3-27x^2+63x+81

H(x)=x^3-x^2+25x-25

- algebra two -
**Reiny**, Tuesday, April 27, 2010 at 9:53pm
H(x) = x^2(x-1) + 25(x-1)

= (x-1)(x^2 + 25)

for zeros,

(x-1)(x^2 + 25) = 0

x = 1, or x = ±5i

±5i are complex conjugates

Off hand, I can't see any for the first one.

- algebra two -
**cole**, Tuesday, April 27, 2010 at 9:57pm
what do you mean

- algebra two -
**Reiny**, Tuesday, April 27, 2010 at 10:59pm
complex conjugates are numbers of the form

a+bi and a-bi

±5i can be written as

0+5i and 0-5i, which fits the above form.

## Answer This Question

## Related Questions

- HELP!!!!!! ASAP - which function below if either has zeros that are complex ...
- algebra two - what does it mean when two of the zeros of a polynomial function ...
- HELP!!!!!! ASAP - what does it mean when two of the zeros of a polynomial ...
- functions - a) find the zeros of t(x) =2x^2 + ix + 3. b) The zeros are not ...
- Algebra - Use the rational zeros theorem to list the potential reational zeros ...
- college algebra - Find the real and complex zeros of the following function. f(x...
- college algebra - Find the real and complex zeros of the following function. f(x...
- Use the rational zeros theorem - Use the rational zeros theorem to list the ...
- Algebra 2 - Find all real zeros of the function f(x)=x^3-27x
- Math - f(x)=x64-4x^2+k. Find the values of k so thath the zeros of f satisfy the...

More Related Questions