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Mathematics 16 Online
OpenStudy (anonymous):

factor: a^2 - 18ab + 81b^2 and 36x^2 - 25y^2

OpenStudy (campbell_st):

the first is a perfect square (a + 9b)^2 the middle term is double the product of the 2 terms 2 *(9ab) the 2nd is the difference of 2 squares you need the square root of each term with a different sign between the terms in each bimonial. (6x - 5y)(6x + 5y)

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