Section 11.1
11.1 The Square Root Property
Remember
:
Every positive number has 2 square roots – a positive one and a negative
one.
Squaring and taking the square root are opposite operations and “undo”
each other.
Example 1
:
2
2
64
64
8
x
x
x
Remember
:
Radials need to be simplified!
Example 2:
2
2
18
18
9
2
3
2
x
x
x
x
Example 3:
2
2
(
4)
9
(
4)
9
4
3
4
3|
4
3
7 |
1
x
x
x
x
x
x
x
64 has both a positive
and a negative square
root
The square root
of x
2
is x.
You need to solve for both
the positive and the
negative square root.

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