math
posted by cassie on .
the sum of two positive integers is 60, and their positive difference is 26. what is the positive difference between the squares of the two integers?

larger  x
smaller  y
x+y = 60
xy = 26
add them
2x = 86
x=43
43+y = 60
y = 17
difference between their squares
= 43^2  17^2 = 1560