from my text book it writes: [see pic]

i don't know how could it prove (2)and(3). why doesn't it show to proving?? i know factor thm but i just don't understand how are they derived from factor theorem. many thanks!

- May 17th 2008, 10:47 AMafeasfaerw23231233polynomial : x^n - a^n divided by x + a , x^n + a^n divided by x+a
from my text book it writes: [see pic]

i don't know how could it prove (2)and(3). why doesn't it show to proving?? i know factor thm but i just don't understand how are they derived from factor theorem. many thanks! - May 17th 2008, 12:15 PMflyingsquirrel
Hi

(2) : As is a positive even integer, it can be written as for .

Hence, . As , can be factored by thanks to the factor theorem.

Does it help ?