Write the polynomial in standard form and identify the zeros of the function and the x-intercepts of its graph.

f(x)=(x-1)(x-1)(x+2i)(x-2i)

So far I have foiled and got the polynomial in standard for as : f(x)=x^4-2x^3-5x^2-8x+4

How do I find the zeros?

Question

Write the polynomial in standard form and identify the zeros of the function and the x-intercepts of its graph.

f(x)=(x-1)(x-1)(x+2i)(x-2i)

So far I have foiled and got the polynomial in standard for as : f(x)=x^4-2x^3-5x^2-8x+4

How do I find the zeros?

anonymous · Answer

do you have a calculator? if so, then plug it in to the graph function and then where it intersects the y axis are the 0's.

anonymous · Answer

I do but I'm not supposed to use it.