Simplify (please show work if possible) HELP!!

See below.

Step-by-step explanation:

So we have the expression:

This is the same as:

Expand:

The left term cancels:

Note that we need the absolute value bars because if a and/or b was negative in the original equation, they will turn positive. Thus, to keep things consistent, we must use the absolute value to make sure that a and b stays negative :)

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step-by-step explanation:

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice