k... so...

How do you simplify these when they are in fraction form.

1. A radical over a radical

2. A radical over a non radical

3. A non radical over a radical?

All help greatly appriciated!

[JSC]AL(AL)AMOBOY

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- May 20th 2008, 06:16 PMjscalalamoboySimplifying radical expressions
k... so...

How do you simplify these when they are in fraction form.

1. A radical over a radical

2. A radical over a non radical

3. A non radical over a radical?

All help greatly appriciated!

[JSC]AL(AL)AMOBOY - May 20th 2008, 08:17 PMMathstud28
- May 21st 2008, 12:37 AMMoo
Hello,

Be careful for this one :D

If you have $\displaystyle \sqrt{ab}$, it isn't necessarily equal to $\displaystyle \sqrt{a} \sqrt{b}$.

Because a and b can be both negative.

$\displaystyle \sqrt{ab}$ will be defined, but not $\displaystyle \sqrt{a}\sqrt{b}$

For example, let's take a=-2 and b=-3.

$\displaystyle \sqrt{ab}=\sqrt{(-2)(-3)}=\sqrt{6}$

But $\displaystyle \sqrt{a} \sqrt{b}=\sqrt{-2} \sqrt{-3}$

Which is... weird :D