check if im right!
(2x^3y^-2)^-2 = y^4/4x^6
-5x^2y^4z^6/45x^7y^-8z^4 = -y^12z^2/9x^5
6.2 * 10^4/3.1*10^-2 =2.6*10^6 = 2000000
(3.25*10^-6)*(2.4*10^2) = 7.8*10^4

M= cubed root 1-p, when p=28
is M = to -3?

2. Originally Posted by missunique
check if im right!
(2x^3y^-2)^-2 = y^4/4x^6 [Yes!]
-5x^2y^4z^6/45x^7y^-8z^4 = -y^12z^2/9x^5 [Yes!]
6.2 * 10^4/3.1*10^-2 =2.6*10^6 = 2000000 [Yes!]
(3.25*10^-6)*(2.4*10^2) = 7.8*10^4 [Yes!]

M= cubed root 1-p, when p=28
is M = to -3? [Yes!]

One thing though: your notation is a little ambiguous. When writing expressions in this way, it is conventional to perform multiplication and division from left to right, so that your denominators should really be placed in parentheses if these are to be correct (this problem does not arise when using the normal $\frac ab$ notation, however).