factorize : 8a3 + 8b3
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=8a3+8b3
=(2a)3+(2b)3
=(2a+2b)(4a2-4ab+4b2)
=8(a+b)(a2-ab+b2)
=(2a)3+(2b)3
=(2a+2b)(4a2-4ab+4b2)
=8(a+b)(a2-ab+b2)
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