Question

Explain, in complete sentences, how you would factor 8x6 - 56x3 + 98.

Answer 1

first divide through by GCF = 4
= 2(4x6 - 28x3 + 49)
now try factor expression in brackets
note 4 = 2*2 and 49 = -7*-7 and middle term is -28
this is perfect square and = (2x^3 - 7)^2

factors are
2(2x^3 - 7)(2x^3 - 7)

Answer 2

* GCF = 2