Powers, Roots, and Radicals

1
7.3Warm-Up
Multiply
1. (x 4)(x 4) 2. (5x 4)(3x 2)
3. (x 5)2
x2 16
15x2 2x 8
x2 10x 25
2
7.3 Binomial Radical Expressions
Objective To learn how to add, subtract,
multiply and divided radical expressions.
State Standard 15.0 Students will be able to
solve radical expressions.

Like radicals are radicals expressions that
have the same index and the same radicand.
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Example 1 Add or Subtract if possible.
a. 7 xy 3 xy b. 2
x 2 5
Not Possible

4
On White Board Add or Subtract if possible.

• a. 2 7 3 7
• 7 5 2 5
• 4 xy 5 xy

Not Possible
5
Example 3 Simplify before adding or subtracting.
3 20 45 4 80

6
On White Board Simplify before adding or
subtracting.
50 3 32 5 18
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7.3 Guided Practice
Page 388 389 1 12 and 27 28
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Example 4 Multiply.
a. (2 4 3 )(1 5 3 )
b. (3 7 )( 3 7 )

20(3)
2
2
9 7
9
On White Board Multiply.
a. (2 3 )(2 3 ) b.
(1 6 )( 1 6 )
3
4
5
1 6
10
Example 6 Divide and simplify.
2 3
4 3
11
On White Board Divide and simplify.
6 15
4 15
12
7.3 Guided Practice (cont.)
Page 388 389 13 15 and 21 25
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7.3 HOMEWORK
Page 388 389 GP1 1 12 and 27 28
GP2 13 15 and 21 25 HW 39 41