## Falling_In_Katt one year ago Simplify by using radical. Rationalize denominators. $2a ^{\frac{ -1 }{ 2 }}$

1. butterflydreamer

|dw:1436536098907:dw|

2. Falling_In_Katt

$\frac{ 1 }{ n \sqrt{a ^{m}} }?$

3. butterflydreamer

that's the rule you want to use to change $a ^{-\frac{ 1 }{ 2 }}$

4. butterflydreamer

|dw:1436536453918:dw|

5. butterflydreamer

so this means that: |dw:1436536538756:dw|

6. butterflydreamer

$\frac{ 2 }{ \sqrt{a} } \times \frac{ \sqrt a }{ \sqrt a }= \frac{ 2 \sqrt a }{ a }$

7. butterflydreamer

and taa daaa it's rationalised because we got rid of the square root on the square root that was on the denominator before by multiplying the top and bottom by square root "a" :) Confused?