Answer:
2 second one cuz x can't be smaller than 0 because x is SQUARED
Answer:
Step 1: Identify the Problem. ...
Step 2: Analyze the Problem. ...
Step 3: Describe the Problem. ...
Step 4: Look for Root Causes. ...
Step 5: Develop Alternate Solutions. ...
Step 6: Implement the Solution. ...
Step 7: Measure the Results.
Commutative, because no matter how you group the equation you will still get to same answer