Standard MCC8EEb

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# Standard MCC8EEb - PowerPoint PPT Presentation

Standard MCC8EEb. Simplify, Add, Subtract, Multiply, and Divide Radical Expressions. Sometimes numbers under the radical sign √ , disguise themselves. First---ALWAYS check to see if they are PERFECT SQUARES—if so, take them out of the radical sign.

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## Standard MCC8EEb

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Presentation Transcript

### Standard MCC8EEb

• First---ALWAYS check to see if they are PERFECT SQUARES—if so, take them out of the radical sign.
• Second—check their factors—in other words, what number times what number equals it.
• Example----√8 is not perfect BUT you can break it into 4 x 2. AND….4 is PERFECT
• SOOOOOOOOOOOOOOOOOOOOO
Break it down!
• √8 = √4 x √2
• Then-----√4 becomes a whole number 2
• We write 2 √2.
Another one
• √12 = ? X ? where one of the numbers is a perfect square
• That’s right---4 x 3
• So, √4 x √3 = √12
• Write √4 as 2 and leave √3 alone
• √18
• √24
• √28
• √40
OK—now just a bit harder….
• Sometimes you miss the largest square. If you do, don’t panic---
• √72----most people say 9 x 8
• √9 x √8 changes to 3 √8
• BUT……..
Watch carefully
• √8 breaks into 4 x 2
• 3 √8 continues to break down
• Change √8 to 2 √2----take the outside 2 and multiply it by the outside 3 to get 6.
• 6 √2 means 6 x 6 = 36
• 36 x 2 = 72----the number we started with
• You try:
• 2√8
• 4 √12
• 3 √18