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Warm up. Estimate the following radicals. 1. 2. 3. 4. 5. 6. Lesson 11.2 Simplifying Radical Expressions (Numbers Only). SWBAT: Multiply and simplify radical expressions containing numbers. Review: The parts of a radical.

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Presentation Transcript
warm up
Warm up

Estimate the following radicals.

1. 2. 3.

4. 5. 6.

lesson 11 2 simplifying radical expressions numbers only
Lesson 11.2 Simplifying Radical Expressions(Numbers Only)

SWBAT: Multiply and simplify radical expressions containing numbers

review the parts of a radical
Review: The parts of a radical

The index. The number above the “tail.” Normally it is a 2 and isn’t even written.

The radical bar. Kind of like a division sign with a tail

The Radicand. The “stuff” underneath the radical bar, can be numbers or variables or both.

how to simplify radicals
How to Simplify Radicals

The radical bar is kind of like “math” prison. Anyone that can, wants to get out of prison.

But there are guards, so in order to bust out of the joint the numbers always break out in groups.

The size of the group depends on the number of guards.

let the escape begin
Let the escape begin…

Step 1: Figure out the number of “guards” in the prison. The index is the number of guards.

How many guards are there in the following problems?

7

2

3

2

slide6
Step 2:

Figure out how many prisoners (the radicand) are going to escape. In order to do this we must create a factor tree to determine how many groups there are

The number of guards determine the number of prisoners in each group trying to escape.

simplifying radicals with numbers
Simplifying Radicals with Numbers.

Simplify the following.

Step one, break the number down into a factor tree.

Step two: Circle any pairs.

The pairs bust out of the klink.

10

2

5

2

the great escape
The Great Escape

So here is how it goes down. Those 3 prisoners, not very smart, see that there are only two guards and think, hey, two of us can charge the guards and get away.

So two of the prisoners (the pair of 2’s) go charging at the guards…but, only one gets away. One gets caught and is never seen or heard from again. And the third guy (the 5), since he didn’t have a partner to charge the guards with, he’s left to rot in prison.

That’s what happens when you lead a life of crime.

slide9
So… which is really just…

so it ends up like this…

This guy didn’t have a partner and so is left in prison

This guy gets away

This guy gets caught and is never heard from again

But teacher, teacher, what happens to the other guy?

He’s Dead, gone, went bye bye, won’t see him again!

The guy that got away

The guy left in prison

another example
Another Example

Simplify the following:

Step 1: Make a factor tree

So that leaves:

Which is:

10

14

2

5

7

2

your turn
Your Turn!

Simplify the following:

1.

2.

3.

4.

8

summary to simplify radicals i must
Summary: To simplify radicals I must …

Homework: Radical Worksheet