Question

factorise:8-4a-2a^3+a^4

Answer 1

8-4a-2a3+a4
(8-4a)-(2a3+a4)
4(2-a)-a3(2-a)
(4-a3)(2-a)

Answer 2

heya here is ur answer...
$= 8 - 4a - {2a}^{3 } + {a}^{4} \\ = 4(2 - a) - {a}^{3}(2 - a) \\ = (4 - {a}^{3})(2 - a)$
Hope it help u..