Question 596096
You are very close. You just made one minor mistake.


When you subtract exponents, it's all done in reference to the numerator. Basically, you should have


{{{4x^3y^(-2)}}} 


Now you flip the fraction {{{y/1}}} to get {{{1/y}}} to make the exponent negative giving you the final answer


{{{(4x^3)/(y^2)}}}