Question

root5-2/root5+2 + root5 +2/root5-2
​

Answer 1

Answer:

Rationalize the denominator.

\frac{\sqrt{5}-2}{\sqrt{5}+2}\times\frac{\sqrt{5}-2}{\sqrt{5}-2}-\frac{\sqrt{5}+2}{\sqrt{5}-2}\times\frac{\sqrt{5}+2}{\sqrt{5}+2}

5

+2

5

−2

×

5

−2

5

−2

−

5

−2

5

+2

×

5

+2

5

+2

\frac{(\sqrt{5}-2)^2}{5-4}-\frac{(\sqrt{5}+2)^2}{5-4}

5−4

(

5

−2)

2

−

5−4

(

5

+2)

2

5-4\sqrt{5}-(5+4\sqrt{5})5−4

5

−(5+4

5

)

5-4\sqrt{5}-5-4\sqrt{5}5−4

5

−5−4

5

-8\sqrt{5}−8

5

Therefore the value of given expression is -8\sqrt{5}−8

5

.

Answer 2

Answer:

don't know the ans sry. If I know I will get u