Simplify the expression.

10x^-3y^4z^2/5x^-4y^3
A.
2xyz^2
B.
2x^-7y^7z^2
C.
5x^12y^12z^2
D.
5xyz^2

wrong again!

10x^-3y^4z^2/5x^-4y^3
= 10/5 x^(-3+4)y^(4-3)z^2
= 2xyz^2
so, A

You are correct, my apologies for the error. The simplified expression is A. 2xyz^2. Thank you for pointing that out!

B. 2x^-7y^7z^2