Evaluate each expression??

Question

????

(a^2-b^2) / (a+b)

a= 2 and b= 3

(x-y)^2 / (x^2-y^2)

x= 5 and y=4

(5x^2) / 3y(x+2)

x=4 and y=6

thanks you very very much!!!!!

Answer 1

1) -5/3

2)-20

3) 5/11

by the way what does ^ mean?