one more question

[sarahj3]

the square root of 81a^9b^12
would be 9 square root of a^9b^12
= 9a^3square root of b^12
=9a^3b^3square root of b^3 =9a^3b^2(b^3)1/2=9a^3b^4square root of b

 

[tkhunny]

This one needs work.

\(\displaystyle \L\sqrt{a^{9}} = \sqrt{a^{8}*a} = \sqrt{a^{8}}*\sqrt{a} = a^{4}*\sqrt{a}\)

 

[sarahj3]

I thought square root of a^9 would be pull out and be a^3?

 

[Denis]

I thought square root of a^9 would be pull out and be a^3?

a^x * a^y = a^(x+y) :remember that :wink:

a^3 * a^3 = a^6, not a^9 : capish?