asked 71.1k views
3 votes
Rationalize the denominator 18/3root2+1​

asked
User AchrafBj
by
7.8k points

1 Answer

5 votes

Answer:


(18(3\sqrt2-1))/(17)

Explanation:

The given expression is :


x=(18)/(3\sqrt2+1)

We need to rationalize the denominator.

Multiplying and dividing both sides by
3\sqrt2+1 as follows :


x=(18)/(3\sqrt2+1)* (3\sqrt2-1)/(3\sqrt2-1)\\\\=(18(3\sqrt2-1))/((3\sqrt2)^2-1)\\\\=(18(3\sqrt2-1))/((18-1)\\\\=(18(3\sqrt2-1))/(17)

So, the answer is
(18(3\sqrt2-1))/(17).

answered
User Dane
by
9.1k points

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