Exponents and Roots
GRE · Flashcards · Application
GRE · FLASHCARDS
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QUESTION
What is the simplified form of
18
2
\frac{\sqrt{18}}{\sqrt{2}}
2
18
(with
⋅
\sqrt{\cdot}
⋅
principal)?
QUESTION
What is the simplified form of
72
\sqrt{72}
72
?
QUESTION
What is the value of
49
\sqrt{49}
49
?
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ANSWER
7
7
7
. Since
7
2
=
49
7^2 = 49
7
2
=
49
and 7 is nonnegative, it is the principal square root.
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