Please help me with factorisation of $64x^6-112x^4+56x^2-7$

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Is it possible to write $$64x^6-112x^4+56x^2-7$$ in linear factors?

If so, what are they?

(Finding it really difficult to ask this question!!)

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Using the Rational Root Theorem, after a bit of testing, we see that there are no rational roots. So you won't find "easily accessible" factors of the form $x-r$, where $ r \in \mathbb {Q} $. Also, see here.