5+5b³ = 5(1+b³)-c^4+27c = -c(c³ - 27) = - c(c - 3)(c² + 3c + 9)
n^4-16 = (n² - 4)(n² + 4) = (n-2)(n+2)(n²+4)a^4-9a² = (a²-9)(a²+1) = (a-3)(a+3)(a²+1)(x-y)(x+y)(x²+y²) = (x-y)(x+y)(x²+y²)(a-1)(a+1)(a²+1) = (a-1)(a+1)(a²+1)(1-a)(1+a)(1+a²)(1+a^4) = -(a-1)(a+1)(1+a²)(a^2+a+1)(x²-1)(x²+1)(x^4+1)(x^8+1) = (x-1)(x+1)(x^2+1)(x^4+1)(x^8+1)
5+5b³ = 5(1+b³)
-c^4+27c = -c(c³ - 27) = - c(c - 3)(c² + 3c + 9)
n^4-16 = (n² - 4)(n² + 4) = (n-2)(n+2)(n²+4)
a^4-9a² = (a²-9)(a²+1) = (a-3)(a+3)(a²+1)
(x-y)(x+y)(x²+y²) = (x-y)(x+y)(x²+y²)
(a-1)(a+1)(a²+1) = (a-1)(a+1)(a²+1)
(1-a)(1+a)(1+a²)(1+a^4) = -(a-1)(a+1)(1+a²)(a^2+a+1)
(x²-1)(x²+1)(x^4+1)(x^8+1) = (x-1)(x+1)(x^2+1)(x^4+1)(x^8+1)