Posted by **melissa** on Sunday, January 21, 2007 at 11:18pm.

Quest:

show that i (imaginary) is a zero of f (x)= x^3+ (3-i)x^2 - 4ix -1

Plug in i for x and add up the terms. You should get zero. Remember that i^2 = -1

## Answer this Question

## Related Questions

- pre calc - Is there any complex numer that is equal to its conjugate? a+bi=a-bi...
- MAth!PLease Help! - 5. Find the x and y intercepts of each linear equation. Be ...
- pre-calc - If f(x)= x-B/x-A, f(2)=0, and f(1) is undefined, what are the calues...
- PRE-CALC - Hi here is my question: Solve: (x-3)/x+3/x2=-6/x^2+2x For my ...
- MATH - I'M IN 6 GRADE PLEASE EXPLAIN HOW TO RENAME FRACTIONS TO DECIMALS AS EASY...
- to bobpurlsey - I had the same answer as you: except I subtracted i-i = 0 Given ...
- Precalc - if a question says is -a a zero of (some equation) can you jsut plug ...
- Chemistry - Ok I think I figured this out but im not sure if its right please ...
- Pre Calc - I am familiar with this type of problem but can't seem to get the ...
- Pre-Calc - Fill in the blank; •In the process of polynomial division (Divisor)(...

More Related Questions