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Can someone explain this Alg 2 problem?

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f(x) -f(2)

(3x+2) - (3*2+2). I would write it as one expression using parentheses...not as separate ones.

Now just simplify....




They don't want it simplified. The answer is 3x-6. DS is insisting it is 3x-2 because when he is doing the math he is doing

-3(2). The parentheses will show him where he went wrong. Thanks.

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