Start Bellwork #. Chapter 11-1 p.560 Square Roots and Irrational Numbers.
2-7 Square Roots & Real Numbers
11
Square Roots √
-
Upload
mr-aulisio -
Category
Documents
-
view
472 -
download
1
Transcript of 2-7 Square Roots & Real Numbers
Square Roots
√
5• Remember:
2
= 5 • 5Five
“squared”Equals five times 5 !!!Trog getting smart !!
Not feel sorry for self anymore!
The Square Root is just the opposite.
√16Means: What number times itself equals 16 ?
TROG KNOW!!2 times 8 equal 16 !!!!
So square root is 2 ! No wait…Square root is 8 !....no can’t be…Trog Confused!!!
OHHH! Trog get it!Square root of 16Is 4 !! ..because 4 times itself equal 16 !!
CALC LESSON
The square roots of some numbers are simple...
√25
√
√
49
81
= 5
= 7
= 9
√√√
9
4
36
= 3
= 2
= 6
Calculate this….
= 3.31662479…11√A number with a non-repeatingdecimal is called irrational
GRAPHING REAL NUMBERS
x < 5
54321 6 7
GRAPHING REAL NUMBERS
x ≥ 65
6867666564 69 70
GRAPHING REAL NUMBERS
y ≤ √4554321 6 7
y ≤ 6.70820….
Sometimes you are to find the negative square roots of some numbers….
-√25
-√
-√
49
81
= -5
= -7
= -9
-√-√-√
9
4
36
= -3
= -2
= -6
Sometimes you are to find the negative square roots of some numbers….
±√25
± √
± √
49
81
= ± 5
= ± 7
= ± 9
