Mathematics, 16.04.2020 09:12 perezsamantha3oqr0za

How can you write the expression with a rationalized denominator?
2+sqrt 5/ 2- sqrt 5

a. -1
b. 1
c. 9+4 sqrt 5
d. -9-4 sqrt 5

I think that the square roots would cancel each other out and the 2/2 would come out to 1 making the answer B. but I'm not sure... Can someone help me figure it out and explain why it is that answer if I'm wrong?

Answers: 1

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How can you write the expression with a rationalized denominator?
2+sqrt 5/ 2- sqrt 5