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Mathematics 8 Online
OpenStudy (anonymous):

(3x-7)(3x+7)

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

do 3x times 3x=9x^2 then 3x times -7=-21x then 7 times 3x=21x then 7 times -7=-49 the -21x and 21x cancel leaving 9x^2-49 <-answer

OpenStudy (anonymous):

9x^2+21x-21x-49 21x-21x=0 that leaves you with: 9x^2-49

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