Radical expressions involve the square root symbol (√) and finding the square root of a number. For example, √9 is 3 because 3 multiplied by itself equals 9.

Adding and subtracting radicals can seem tricky at first, but it becomes much easier once you understand the principle behind it, similar to how you handle adding and subtracting algebraic expressions.

Multiplication and division of radicals involve combining square roots (and roots of higher degree) using arithmetic operations.

Radical equations are equations that contain radical expressions. The goal is to find the value that makes the equation true. To solve a radical equation, you need to isolate the radical expression and then square both sides of the equation to remove the square root symbol.