So, does anyone know about rationalizing denominators?

I need help
What's the square root of 5 over twenty 5 simplified??

sqrt(5) over 25 = 0.0894427191
or
1/11.1803399

Originally Posted by fratey

sqrt(5) over 25 = 0.0894427191

lol, thanks. but i can't have it in decimal form.

Check the edit

Originally Posted by fratey

Check the edit

oh, ok

Originally Posted by fratey

sqrt(5) over 25 = 0.0894427191
or
1/11.1803399

Both are invalid for rationalizing a fraction.

You cannot have decimals in fractions. At least, not if you don't want to be yelled at.


Just to check, the formula is (5^(1/2))/25? If so, the denominator has already been rationalized. If you want to rationalize the numerator, that's a bit different.

What's the square root of 5 over twenty 5 simplified??

√5 / 25

Write numerator and denominator in terms of a common base (let's use 5)

= 5^(1/2) / 5^2

In division, subtract the exponent in the denominator from the exponent in the numerator

= 5^(1/2 - 2)
= 5^(-3/2)

As John pointed out, this simplification is not an example of rationalizing the denominator, though I see where you might be confused.