Answer :

To solve the expression [tex]\( \sqrt{\left(a^2 - b^2\right)^2} \)[/tex], let's go through the steps systematically.

1. Consider the Expression Inside the Square Root:
The expression inside the square root is [tex]\( \left(a^2 - b^2\right)^2 \)[/tex].

2. Simplify [tex]\( a^2 - b^2 \)[/tex]:
Recognize that [tex]\( a^2 - b^2 \)[/tex] is a standard algebraic expression known as the difference of squares. However, in this particular problem, this recognition isn't necessary for simplification; we proceed by focusing on [tex]\( (a^2 - b^2) \)[/tex] directly.

3. Square the Expression:
When [tex]\( a^2 - b^2 \)[/tex] is squared, we get:
[tex]\[ (a^2 - b^2)^2 \][/tex]

4. Take the Square Root of the Squared Expression:
The next step is to take the square root of [tex]\( (a^2 - b^2)^2 \)[/tex]:
[tex]\[ \sqrt{(a^2 - b^2)^2} \][/tex]

5. Use the Property of Square Roots:
According to the property of square roots, [tex]\( \sqrt{x^2} = |x| \)[/tex]. Therefore:
[tex]\[ \sqrt{(a^2 - b^2)^2} = |a^2 - b^2| \][/tex]

Therefore, the simplified form of the given expression is:
[tex]\[ \sqrt{\left(a^2 - b^2\right)^2} = |a^2 - b^2| \][/tex]