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Kipish [7]
2 years ago
11

Plz answer my question

Mathematics
1 answer:
likoan [24]2 years ago
8 0

Step-by-step explanation:

a -  \frac{1}{a}  \\  \frac{ {a}^{2} - 1 }{a}  \\  =  \frac{ {(2 +  \sqrt{3} )}^{2}  - 1}{2 +  \sqrt{3} }  \\  = \frac{7 + 4 \sqrt{3} - 1 }{2 +  \sqrt{3} }  =  \frac{6 + 4 \sqrt{3} }{2 +  \sqrt{3} }  = 2 \sqrt{3}

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