Wednesday

March 4, 2015

March 4, 2015

Posted by **aria** on Wednesday, March 27, 2013 at 12:24am.

F9x)=x^3-5x^2+4x-20; zero:2i

I don't get it. Can someone please show me what to do with this?

- math -
**Steve**, Wednesday, March 27, 2013 at 10:47amif 2i is a zero, so is -2i

so, (x-2i)(x+2i) = x^2+4 divides f(x)

doing the division, we have

f(x) = (x-5)(x^2+4)

so, the zeros are 5,2i,-2i

**Answer this Question**

**Related Questions**

calculus - use the given zeros 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...

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

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

college algebra - use the given zero to find the remaining zeros of each ...

to your reply, please check again - that should of said Zero: 5 - 3 i for the ...

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

college algebra - use the given zero to find the remaining zeros of the function...

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

math - use the given zero to find the remaining zeros of the fuction...f(x)=x to...