[raees]

Hi, could someone please tell me what to do next.

This is the question:



And first part is fine... I use the factor theorem to show that it is a root.

Part B, however after stating that if 'i' is a root then '-i' is also another root and that if we let the equation have the form f(x), then f(x)=(x-i)(x+i)q(x), where q(x) is a quadratic...

I dont know what to do.

Any ideas?

[electriic_ink]

(x-i)(x+i) = ?

[raees]

OH! , ok!

thank you, I get it now