Answer :

Certainly! Let's break down the given expression step-by-step to expand and simplify it:

Given the expression:
[tex]$(a - b)^2 + 4a^2b^2$[/tex]

### Step 1: Expand [tex]\((a - b)^2\)[/tex]
First, we'll expand the squared term [tex]\((a - b)^2\)[/tex].

[tex]\[ (a - b)^2 = a^2 - 2ab + b^2 \][/tex]

### Step 2: Combine the expanded term with [tex]\(4a^2b^2\)[/tex]
Now we need to add the expansion we just found to the second term in the expression, [tex]\(4a^2b^2\)[/tex].

The expression now looks like this:
[tex]\[ a^2 - 2ab + b^2 + 4a^2b^2 \][/tex]

### Step 3: Combine like terms
There are no like terms to combine between [tex]\(a^2\)[/tex], [tex]\(-2ab\)[/tex], [tex]\(b^2\)[/tex], and [tex]\(4a^2b^2\)[/tex]. Therefore, the expanded and simplified form of the expression is:

[tex]\[ 4a^2b^2 + a^2 - 2ab + b^2 \][/tex]

So, the fully expanded expression for [tex]\((a - b)^2 + 4 a^2 b^2\)[/tex] is:

[tex]\[ 4a^2b^2 + a^2 - 2ab + b^2 \][/tex]