1. Square Root of a Number: Radical Symbol: Radicand:
Square Roots Squaring and Square Rooting are INVERSE OPERATIONS. They undo one another.
THINK! If = then = 10
Square Root of a Number:
Radical Symbol: Radicand:
Special Cases:
If b2 = a, then b is a square root of a
The number inside the radical symbol
The (positive) square root of 16.
It is known as the principal square root.
Examples:
1. 6.
2. 7.
3. 8.
4. 9.
The negative square root of 16.
This is read
“plus or minus the square root of 16”.
Zero has only one square root.
Negative numbers have
NO REAL SQUARE ROOTS.
A number times itself will NEVER be negative!