Question

if x =2+√3 find x=-1/x​

Answer 1

Correct option is
C
14,−8
3
​

x=2−
3
​
⇒
x
1
​
=
2−
3
​

1
​
=2+
3
​


(x
2
+
x
2

1
​
)=(x+
x
1
​
)
2
−2=(2−
3
​
+2+
3
​
)
2
−2=14

(x
2
−
x
2

1
​
)=(x−
x
1
​
)(x+
x
1
​
)=(4×−2
3
​
)=−8
3
​