Thread: Rational Exponents and Radicals

Did I do these right?

Simplify:

129. Sqrt. y^14
y^7

131. - Sqrt. a^6
-a^3

141. Cubed Rt. 125b^15
125b^5

Before I continue, I want to make sure, firstly, that I understand what I'm doing and, secondly, that I'm distributing the fractions properly. For example:

Cubed Rt. 125b^15

I multiplied 1/3 and 15 and got 5. Should I have distributed 1/3 to the 125, too? ...Assuming I'm doing all this right...

Originally Posted by Mad

Did I do these right?

Simplify:

129. Sqrt. y^14
y^7

131. - Sqrt. a^6
-a^3

141. Cubed Rt. 125b^15
125b^5

Before I continue, I want to make sure, firstly, that I understand what I'm doing and, secondly, that I'm distributing the fractions properly. For example:

Cubed Rt. 125b^15

I multiplied 1/3 and 15 and got 5. Should I have distributed 1/3 to the 125, too? ...Assuming I'm doing all this right...

You did everything correctly. Don't do the distribution: it gives an incorrect answer.

-Dan