Factorization
A. 343-1/y³
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Step-by-step explanation:
= 343 - 1/y³
=(7)³ - (1/y)³
using formula,
a³- b³= (a-b)(a²+ ab+ b²)
=[7-(1/y)] [7²+(7)(1/y)+(1/y)²]
=(7y-1/y) (49+7/y + 1/y²)
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