Question

What is x^4-4x^3-32 in factored form

Answer 1

Factoring: x4-4x3+8x-32

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1: 8x-32
Group 2: -4x3+x4

Pull out from each group separately :

Group 1: (x-4) • (8)
Group 2: (x-4) • (x3)
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Add up the two groups :
(x-4) • (x3+8)