Roots
o
Square roots:
,
, the number you want to find the square root of.
o
Cube roots:
,
,
For example:
To find the square root of 144:
,
, 144
To find the cube root of 216:
,
,
, 216
Note
: The GED is limited to square roots (“to the 2nd power”) and cube roots (“to the 3rd
power”).
Practice:
a. What is the square root of 961?
b. What number times itself equals 784?
c. What is the cube root of 1728?
Decide if each of the next three statements is True or False.
If False, rewrite the statement so that it is true:
d. The square root of 16 is 256.
e. The cube root of 9 is 3.
f.
The cube root of 343 is larger than the square root of 49.
Draft updated - January 2022
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