Anyone good with surds
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Anyone good with surds

[From: ] [author: ] [Date: 11-12-10] [Hit: ]
but how do I get it?Thank you soo much!......
How do you write √245 in the form of x√5 ?

The answer is 7√5 .... but how do I get it?

Thank you soo much! There are things I would feel too embarrassed to ask people in real life :P :$

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245 = 5*49
So you can take out the sqrt of 49 which is 7 giving 7sqrt(5)

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√245 = √(49*5) = √49 * √5 = 7√5

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√245 = √(5*49) = √5 * √49 = √5 * 7 = 7√5
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