Posted by **student** on Monday, June 24, 2013 at 3:09am.

solve x^4-8x^3+64x-105=0 given that 2-i is one solution.

must be tired cause my steps are not calculating correctly

- algebra -
**Steve**, Monday, June 24, 2013 at 4:52am
what you should do is show how far you got, if you want help.

another root is necessarily 2+i, so

(x^2-4x+5) divides x^4-8x^3+64x-105

In fact,

x^4-8x^3+64x-105 = (x^2-4x+5)(x^2-4x-21)

Now it's a piece o' cake, no?

## Answer this Question

## Related Questions

- algebra - factor the following expression into a product of two binomials. 64x^2...
- Algebra - 3x+4y=12 solve for solution (0.)(.3/4) (,0) (8/3,) You are given the ...
- MATH - 20. A certain computer can perform 105 calculations per second. How many ...
- college algebra - 1. find the equation of the line with the given properties. ...
- Math - 1 2/5 divided by 21 Which is correct? A. 21/1 x 5/7 = 105/7 =15 or B. 1/...
- algebra - I don;t know how to solve the following equation. 9+6x=-6x+105 I have...
- algebra - I don;t know how to solve the following equation. 9+6x=-6x+105 I have...
- Math - Jerry earned $18,500 one year and then recieved a 10.5% raise. What is ...
- Algebra - find the solution set for -x^2=-64x
- math - solve the polynomial ineqaality. express the solution set in interval ...

More Related Questions