I am so lost with no hope of finding daylight on this one. 

Can someone break this down so that is easier to understand?

What expression raised to the fourth power is 81x^12y^8z^16



Let the answer be w



So 



 = 



Raise both sides to the 1/4 power, which is the same as

fourth root and there are always 2 even roots of every

number but 0, one positive and one negative: 



 = ±



Write  as 



 = ±



Multiply each inner exponent on the right by the outer exponent 



 = ±



 = ±



 = ±



Edwin 

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