posted by jasmine20 on .
i am clueless about this:
(#1)What expression raised to the fourth power is 81x^12y^8z^16?
(#2)Simplify each of the following expressions. Write your answers with positive exponents only.
(x^2)^-3(x^-2) divided by (x^2)^-4
#1 answer (3x^3)(y^2)(z^4)
(x^3)^4=x^12 multiply powers
#2answer is 1
because (x^2)^-3=x^-6 mulityply powers
(x^-6)(x^-2)=x^-8 add powers
(x^2)^-4=x^-8 multiply powers
(x^-8)/(x^-8)= x^0 subtract powers and any number to the power of zero is 1
thank you for explaining them to me.