2a⁵-32a using a²-b²=(a-b)(a+b)
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2a^5-32a,
= 2a(a^4-2^4),
= 2a[(a^2)^2-(2^2)^2],
= 2a[(a^2+4)(a^2-4),
= 2a (a^2+4)(a-2)(a+2).
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