Radicals & Absolute Values
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QUESTION
What is the principal square root of 81?
QUESTION
Simplify
√
72
\text{√}72
√
72
.
QUESTION
Simplify
√
18
√
2
\frac{\text{√}18}{\text{√}2}
√
2
√
18
.
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ANSWER
√
9
=
3
\text{√}9 = 3
√
9
=
3
. Simplify by dividing:
18
2
=
18
2
=
9
\frac{\sqrt{18}}{\sqrt{2}} = \sqrt{\frac{18}{2}} = \sqrt{9}
2
18
=
2
18
=
9
.
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