I need help with simplifying this expression.

Question

4 + (2 + 1)2

 

I'm not sure where to start.

Answer 1

The order in which math operations are performed is PEMDAS:

• Operations within Parentheses
• Exponents
• Multiplications
• Divisions
• Additions
• Subtractions

 

4 + (2+1)2

 

First do the operations within the Parentheses:

 

4 + (2+1)2

4 + (3)2

 

There are no exponents, so do the multiplication next:

 

4 + 3(2)

4 + 6

 

Last, do the addition:

 

4 + 6 = 10

Answer 2

Well,  you want to start by understanding what it says.

 

The "4" is easy.  (2+1)2 means take what is inside the parentheses and multiply it by 2.

 

So the first step is to simplify what's inside the parentheses.  So change (2+1) to (3).

 

4 + (2 + 1)2 = 4 + (3)2

 

When you have additions and multiplications together in the same expression, you always do multiplications first.  So you would then change this to:

 

4 + 6.

 

Now just add the 4 and 6 together.

 

 

 

Answer 3

4 + (2 + 1)2

 

Consider PEMDAS rules

 

4 + (4 + 2)

4 + 6

10