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Mathematics 21 Online
OpenStudy (anonymous):

Multiply and simplify (3t-2)(3t+2)

OpenStudy (saifoo.khan):

9t^2 + 6t -6t - 4 9t^2 - 4

jhonyy9 (jhonyy9):

us the formula a*2 -b*2 =(a+b)(a-b)

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