Question

rationalise the denominator 1/square root 3-5?​

Answer 1

Answer:

Explanation:

Multiply the fraction by 1+√3+√5/ 1+√3+√5

. This is the same as multiplying by 1. This is two eliminate two surds.

The denominator you should get after multiplying the two fractions is

(1+√3+√5)⋅(1+√3−√5)

. We can write this as

((1+√3)−√5)(1+√3)+√5) .

This can then be made is DOPS and written as :

(1+√3)²−(√5)².

Simplify that to get:

1+3+2√3−5

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