Sunday

March 29, 2015

March 29, 2015

Posted by **CheezyReezy** on Wednesday, June 1, 2011 at 8:57pm.

f(x) = x^4 - 91x^2 - 900

Hi, I need help... I'm not understanding this complex zero..

- Math -
**Mgraph**, Wednesday, June 1, 2011 at 9:58pmSubstitute: x^2=z => x^4=z^2

z^2-91z-900=0

(z-100)(z+9)=0

If z=100, x^2=100 then x=10 or x=-10

If z=-9, x^2=-9=9i^2 then x=3i or x=-3i

**Answer this Question**

**Related Questions**

algebra - find all complex zeros for the following polynomial function please ...

find real and complex 0 - Find the real and complex zeros of the following ...

Algebra - Can someone please explain how to do these problems. 1)write a ...

calculus - find the complex zeros of the polynomial function. write f in ...

Math - potential zero - List all possible (or potential) rational zeros for the ...

Math - Consider the polynomial f(x) = 2x^3 – 3x^2 – 8x – 3. (a) By using the ...

Find the complex zeros - Find the complex zeros of the polynomial function. ...

Math-Polynomials/Zeros - How do I find complex zeros in a an equation if the ...

Algebra - Consider the polynomial: f(x) = 2x^3 – 3x^2 – 8x – 3. (a) By using the...

Math Problem2 - List all possible rational zeros for the polynomial below. Find ...