i have both question and answer posted. i just need the answer explained in better detail. for example, i dont understand why 2.2 for the first part. please make this easy to understand

3.1-4 Is 2"+1 0(2")? Is 22n (2")? 2 Step 1 of 1 Done The first Statement is true, and the Second is false. Observe that 2+1 -2.2" const.2" =0(2) Also note 221-(2) =00(2") Hence 202") Since ((2")0(2) =