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Mathematics 19 Online
OpenStudy (shelby1290):

Expand and simplify. a) 3(x-6)(x+5) b) 3a(a-5)-(2a+1)(a-7) c) -2n(2n+1)+(n+2)^2 d) 3(2x+1)^2-2(3x-1)^2

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