summerpaytas
summerpaytas
27-01-2019
Mathematics
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What is the factored form of a^2 - 121?
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bakecheese
bakecheese
27-01-2019
A^2 - 121
= a^2 - 11^2
=(a+11)(a-11)
Since a^2-b^2 =(a+b)(a-b)
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