3 Розкладіть на множники: x^{8}-1 A (x+1)(x^{7}+x^{6}+x^{5}+x^{4}+x^{3}+x^{2}+x (x-1)(x^{7}-x^{6}-x^{5}-x^{4}-x^{3}-x^{2}-x . B (x-1)(x^{7}+x^{6}+x^{5}+x^{4}+x^{3}+x^{2}+x. (x-1)(x^{8}+x^{7}+x^{6}+x^{5}+x^{4}+x^{3}+x^{2} Д (x+1)(x^{8}+x^{7}+x^{6}+x^{5}+x^{4}+x^{3}+x^{2}