Answer:
4xy
Step-by-step explanation:
(x+y) (x+y) - (x-y) (x-y)
(x² + xy + xy + y²) - (x² - xy - xy + y²)
(x² + 2xy + y²) - (x² - 2xy + y²)
x² + 2xy + y² - x² + 2xy - y²
x² - x² + 2xy + 2xy + y² - y²
that could literally be anything, as long as the first sum is greater then the second.
example;
(2+4) (3+5) - (6+1) (5+2)
(or, 6+8 = 14, 7+7 = 14, 14 - 14 = 0)
hope this helped :)
