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1+(4sqrt(3))/(2-sqrt(2)) -30/(4sqrt(3)-s...

`1+(4sqrt(3))/(2-sqrt(2)) -30/(4sqrt(3)-sqrt(18)) - sqrt(18)/(3+2sqrt(3))` is simplified to:

A

0

B

1

C

`sqrt(2)`

D

`sqrt(3)`

Text Solution

AI Generated Solution

The correct Answer is:
To simplify the expression \( 1 + \frac{4\sqrt{3}}{2 - \sqrt{2}} - \frac{30}{4\sqrt{3} - \sqrt{18}} - \frac{\sqrt{18}}{3 + 2\sqrt{3}} \), we will follow these steps: ### Step 1: Simplify each term separately 1. **Simplifying \( \frac{4\sqrt{3}}{2 - \sqrt{2}} \)**: - Multiply the numerator and denominator by the conjugate of the denominator, \( 2 + \sqrt{2} \): \[ \frac{4\sqrt{3}(2 + \sqrt{2})}{(2 - \sqrt{2})(2 + \sqrt{2})} \] - The denominator simplifies to: \[ 2^2 - (\sqrt{2})^2 = 4 - 2 = 2 \] - Thus, we have: \[ \frac{4\sqrt{3}(2 + \sqrt{2})}{2} = 2\sqrt{3}(2 + \sqrt{2}) = 4\sqrt{3} + 2\sqrt{6} \] 2. **Simplifying \( -\frac{30}{4\sqrt{3} - \sqrt{18}} \)**: - Note that \( \sqrt{18} = 3\sqrt{2} \), so we rewrite it as: \[ -\frac{30}{4\sqrt{3} - 3\sqrt{2}} \] - Again, multiply by the conjugate \( 4\sqrt{3} + 3\sqrt{2} \): \[ -\frac{30(4\sqrt{3} + 3\sqrt{2})}{(4\sqrt{3} - 3\sqrt{2})(4\sqrt{3} + 3\sqrt{2})} \] - The denominator simplifies to: \[ (4\sqrt{3})^2 - (3\sqrt{2})^2 = 48 - 18 = 30 \] - Thus, we have: \[ -\frac{30(4\sqrt{3} + 3\sqrt{2})}{30} = -(4\sqrt{3} + 3\sqrt{2}) = -4\sqrt{3} - 3\sqrt{2} \] 3. **Simplifying \( -\frac{\sqrt{18}}{3 + 2\sqrt{3}} \)**: - Rewrite \( \sqrt{18} = 3\sqrt{2} \): \[ -\frac{3\sqrt{2}}{3 + 2\sqrt{3}} \] - Multiply by the conjugate \( 3 - 2\sqrt{3} \): \[ -\frac{3\sqrt{2}(3 - 2\sqrt{3})}{(3 + 2\sqrt{3})(3 - 2\sqrt{3})} \] - The denominator simplifies to: \[ 3^2 - (2\sqrt{3})^2 = 9 - 12 = -3 \] - Thus, we have: \[ -\frac{3\sqrt{2}(3 - 2\sqrt{3})}{-3} = \sqrt{2}(3 - 2\sqrt{3}) = 3\sqrt{2} - 2\sqrt{6} \] ### Step 2: Combine all the simplified terms Now we combine all the simplified terms: \[ 1 + (4\sqrt{3} + 2\sqrt{6}) - (4\sqrt{3} + 3\sqrt{2}) + (3\sqrt{2} - 2\sqrt{6}) \] ### Step 3: Simplify the expression Combine like terms: - The \( 4\sqrt{3} \) terms cancel out: \[ 1 + 2\sqrt{6} - 3\sqrt{2} + 3\sqrt{2} - 2\sqrt{6} = 1 + 0 + 0 = 1 \] ### Final Answer The expression simplifies to: \[ \boxed{1} \]
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