Square Root of a Number: Radical Symbol: Radicand:

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Presentation transcript:

Square Root of a Number: Radical Symbol: Radicand: Square Roots Squaring and Square Rooting are INVERSE OPERATIONS. They undo one another. THINK! If 102 = 100 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. 5. 10. 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!