Which of the equations are true identities? A. (a+b)(2a+1)=a(2a+2b+1) B. (n+2) 2 −n 2 =4(n+1)

Which of the equations are true identities? A. (a+b)(2a+1)=a(2a+2b+1) B. (n+2) 2 −n 2 =4(n+1)

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