Explanation of Squaring Radicals
Squaring radicals is a mathematical process that involves raising a square root expression to the power of two. When you square a radical, you are essentially reversing the square root operation.
Basic Concept
If you have a radical expression, like the square root of $x$ (written as $\sqrt{x}$), then squaring this radical results in the original number $x$.
Mathematically, this can be expressed as:
$(\sqrt{x})^2 = x$
Examples
Let’s consider a few examples to better understand this concept:
 Squaring the square root of 9:
$(\sqrt{9})^2 = 9$
 Squaring the square root of 25:
$(\sqrt{25})^2 = 25$
Key Points to Remember

Cancelling Effect: Squaring a square root "cancels out" the radical, leaving you with the radicand (the number under the square root symbol).

Nonnegative Results: Given that the square root function returns the principal (nonnegative) square root, squaring a radical also results in a nonnegative number.
Complex Radicals
For cases involving more complex expressions, the same basic principle applies. For instance:
$(\sqrt{a + b})^2 = a + b$
Example: Squaring the square root of $3 + 4$:
$(\sqrt{3 + 4})^2 = (\sqrt{7})^2 = 7$
Conclusion
Squaring radicals simplifies the expression by removing the square root, essentially "undoing" the square root operation. This fundamental property is widely used in algebra to simplify equations and solve problems involving radicals.