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Question

Factorize each of the following expression:
256x5 − 81x

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Solution

256x5-81x=x(256x4-81)=x[(16x2)2-92]=x(16x2+9)(16x2-9)=x(16x2+9)[(4x)2-32]=x(16x2+9)(4x+3)(4x-3)

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