The problem asks us to express $\frac{3\sqrt{2}-\sqrt{3}}{2\sqrt{3}-\sqrt{2}}$ in the form $\frac{\sqrt{m}}{\sqrt{n}}$, where $m$ and $n$ are whole numbers. Then, we must choose the correct answer from the given options: (a) $\frac{\sqrt{6}}{\sqrt{10}}$, (b) $\frac{\sqrt{150}}{\sqrt{100}}$, (c) $\frac{2\sqrt{6}}{\sqrt{10}}$, (d) $\frac{5\sqrt{6}}{\sqrt{10}}$.

AlgebraRadicalsRationalizationSimplificationFractions
2025/3/19

1. Problem Description

The problem asks us to express 323232\frac{3\sqrt{2}-\sqrt{3}}{2\sqrt{3}-\sqrt{2}} in the form mn\frac{\sqrt{m}}{\sqrt{n}}, where mm and nn are whole numbers. Then, we must choose the correct answer from the given options: (a) 610\frac{\sqrt{6}}{\sqrt{10}}, (b) 150100\frac{\sqrt{150}}{\sqrt{100}}, (c) 2610\frac{2\sqrt{6}}{\sqrt{10}}, (d) 5610\frac{5\sqrt{6}}{\sqrt{10}}.

2. Solution Steps

First, let's rationalize the denominator of the given expression:
323232=32323223+223+2 \frac{3\sqrt{2}-\sqrt{3}}{2\sqrt{3}-\sqrt{2}} = \frac{3\sqrt{2}-\sqrt{3}}{2\sqrt{3}-\sqrt{2}} \cdot \frac{2\sqrt{3}+\sqrt{2}}{2\sqrt{3}+\sqrt{2}}
=(323)(23+2)(23)2(2)2 = \frac{(3\sqrt{2}-\sqrt{3})(2\sqrt{3}+\sqrt{2})}{(2\sqrt{3})^2 - (\sqrt{2})^2}
=3223+32232332432 = \frac{3\sqrt{2} \cdot 2\sqrt{3} + 3\sqrt{2} \cdot \sqrt{2} - \sqrt{3} \cdot 2\sqrt{3} - \sqrt{3} \cdot \sqrt{2}}{4 \cdot 3 - 2}
=66+32236122 = \frac{6\sqrt{6} + 3 \cdot 2 - 2 \cdot 3 - \sqrt{6}}{12 - 2}
=66+66610 = \frac{6\sqrt{6} + 6 - 6 - \sqrt{6}}{10}
=5610=62 = \frac{5\sqrt{6}}{10} = \frac{\sqrt{6}}{2}
Now, we need to express 62\frac{\sqrt{6}}{2} in the form mn\frac{\sqrt{m}}{\sqrt{n}}.
We can rewrite 2 as 4\sqrt{4}, so
62=64 \frac{\sqrt{6}}{2} = \frac{\sqrt{6}}{\sqrt{4}}
To obtain one of the answer options, we can multiply both the numerator and denominator by 55\sqrt{\frac{5}{5}} to get
64551=64 \frac{\sqrt{6}}{\sqrt{4}} \cdot \frac{\sqrt{\frac{5}{5}}}{1} = \frac{\sqrt{6}}{\sqrt{4}}
To match one of the forms of the given answers, we can write
62=5610=256100=150100 \frac{\sqrt{6}}{2} = \frac{5\sqrt{6}}{10} = \frac{\sqrt{25 \cdot 6}}{\sqrt{100}} = \frac{\sqrt{150}}{\sqrt{100}}
Another way to compare the result 62\frac{\sqrt{6}}{2} to the given options is to compare their squares:
(610)2=610=35=0.6(\frac{\sqrt{6}}{\sqrt{10}})^2 = \frac{6}{10} = \frac{3}{5} = 0.6
(150100)2=150100=32=1.5(\frac{\sqrt{150}}{\sqrt{100}})^2 = \frac{150}{100} = \frac{3}{2} = 1.5
(2610)2=4610=2410=2.4(\frac{2\sqrt{6}}{\sqrt{10}})^2 = \frac{4 \cdot 6}{10} = \frac{24}{10} = 2.4
(5610)2=25610=15010=15(\frac{5\sqrt{6}}{\sqrt{10}})^2 = \frac{25 \cdot 6}{10} = \frac{150}{10} = 15
(62)2=64=32=1.5(\frac{\sqrt{6}}{2})^2 = \frac{6}{4} = \frac{3}{2} = 1.5
Therefore, the correct answer is 150100\frac{\sqrt{150}}{\sqrt{100}}.

3. Final Answer

(b) 150100\frac{\sqrt{150}}{\sqrt{100}}

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