Question
$$\sqrt {\frac{{25}}{{81}} - \frac{1}{9}} = ?$$
Answer: Option B
$$\eqalign{
& = \sqrt {\frac{{25}}{{81}} - \frac{1}{9}} \cr
& = \sqrt {\frac{{25 - 9}}{{81}}} \cr
& = \sqrt {\frac{{16}}{{81}}} \cr
& = \frac{{\sqrt {16} }}{{\sqrt {81} }} \cr
& = \frac{4}{9} \cr} $$
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$$\eqalign{
& = \sqrt {\frac{{25}}{{81}} - \frac{1}{9}} \cr
& = \sqrt {\frac{{25 - 9}}{{81}}} \cr
& = \sqrt {\frac{{16}}{{81}}} \cr
& = \frac{{\sqrt {16} }}{{\sqrt {81} }} \cr
& = \frac{4}{9} \cr} $$
Was this answer helpful ?
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