posted by deena .
sorry -- here it is
simplify this expression : (x^3 y)/(y^(1/2) x^(-2) ) when x is not = 0, and y is not equal to 0
WE know that [formula a^m/a^n=a^(m-n)]
where m>n it means in division when base (means 'a') are same with different power('m' and 'n') then powers are subtracted