keepitreal
New member
- Joined
- Sep 11, 2007
- Messages
- 5
3 - square root 5
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3 + square root 5
I need to simplify it.
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3 + square root 5
I need to simplify it.
keepitreal said:3 - square root 5
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3 + square root 5
Close keepi!keepitreal said:7- 3 square root 5
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4
keepitreal said:3 - square root 5
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3 + square root 5
\(\displaystyle = \frac{(3 - sqrt{5})}{(3 + sqrt{5})}
= \frac{(3 - sqrt{5})}{(3 + sqrt{5})} X \frac{(3 - sqrt{5})}{(3 - sqrt{5})}
= \frac{(3 - sqrt{5})^2}{(3^2 - 5)}
= \frac{(9 + 5 - 6sqrt{5})}{4}
= \frac{(14 - 6sqrt{5})}{4}
= \frac{(7 - 3sqrt{5})}{2}\)
I need to simplify it.