math
posted by jazmin .
please is there anybody who can help me to do my assignment about sums and differences of a rational algebraic expression this is the problem.... x^2/xy  y^2/xy=? another is 3y/3y5  5/3y5=? another is 10/x3  2x+9/x3 + 5x7/x3 please answer it.......

You must have meant
x^2/(xy)  y^2/(xy)
= (x^2  y^2)/(xy) , you had a common denominator
= (x+y)(xy)/(xy) , difference of squares at the top
= x + y , x ≠ y