Simplify the expression.

-p+3+2p-2p

 1.2    Multiply  (3-2p)  by  (3-2p) 

The rule says : To multiply exponential expressions which have the same base, add up their exponents.

In our case, the common base is  (3-2p)  and the exponents are :
          1 , as  (3-2p)  is the same number as  (3-2p)1 
 and   1 , as  (3-2p)  is the same number as  (3-2p)1 
The product is therefore,  (3-2p)(1+1) = (3-2p)2 

other answer is correct. i had used the radius of the radius somehow. a website: