Please show me how to simplify these expressions:1) (-x)^2(-x)^5
2) (-3m^3)^2
3) (x/y)^-3
Thanks very much for your consideration.
(-x)^2 (-x)^5 = (-x)^7 = -x^7
(-3m^3)^2 = (-3)^2 (m^3)^2 = 9m^6
(x/y)^-3 = (y/x)^3 = y^3/x^3
or,
(x/y)^-3 = x^-3 / y^-3 = x^-3 y^3