Friday

December 19, 2014

December 19, 2014

Posted by **Heather** on Saturday, December 1, 2012 at 5:50pm.

h(x)=x^4-9x^3+12x^2+138x-1360

zero:3-5i

enter the remaining zeros of f

please show work

- calculus -
**Damon**, Saturday, December 1, 2012 at 6:16pm(3 - 5i) and (3+5i)

therefore divide by product(x-3+5i) and (x-3-5i)

or

(x^2 - 6 x + 34)

so do long division

x^4-9x^3+12x^2+138x-1360

-------------------------

x^2 - 6 x + 34

which is (x^2-3x-40) whew, no remainder

find the two zeros of that

x = [ 3 +/- sqrt (9+160)]/2

= [3+/-13]/2

= -5 and 8

so in the end

-5

+8

-3-5i

-3+5i

- calculus -
**Damon**, Saturday, December 1, 2012 at 6:17pmThat was fun :)

- typo -
**Damon**, Saturday, December 1, 2012 at 7:18pm-5

+8

3-5i

3+5i

**Answer this Question**

**Related Questions**

Algebra - Use the given zero to find the remaining zeros of the function. f(x)=x...

algebra college - find the remaining zeros of f. degree 4 zeros i, -18+i enter ...

use the given zero - Use the given zero to find the remaining zeros of the ...

Pre-calc - Use the given zero to find the remaining zeros of the function: h(x)=...

algebra - use the given zero to find the remaining zeros of the function h(x)=x...

pre-cal - use the given zero to find the remaining zeros of the function. h(x)=x...

math - use the given zero to find the remaining zeros of the function: F9x)=x^3...

calculus - use rational zeros theorem to find all the real zeros of the ...

Decartes Rule of Signs - Could you explain to me decartes Rule of signs? Here ...

college algebra--need help please!! - information is given about a polynomial f(...