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  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1 2006-10-17 02:41:02

dericteong
Member
Registered: 2006-10-16
Posts: 13

Surd again..

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#2 2006-10-17 03:22:01

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Surd again..

In problems like this, you need to remove all surds from the denominator of the fraction.

When the denominator has 2 terms a+b, you rationalise it by multiplying by (a-b)/(a-b).


Why did the vector cross the road?
It wanted to be normal.

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#3 2006-10-17 03:49:09

dericteong
Member
Registered: 2006-10-16
Posts: 13

Re: Surd again..

Thanks again.. mathsyperson.

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