Decomposition factor 10A ^ 2 (x + y) ^ 2-5A (x + y) ^ 3

Decomposition factor 10A ^ 2 (x + y) ^ 2-5A (x + y) ^ 3

10a^2(x+y)^2-5a(x+y)^3
=5a(x+y)²(2a-x-y)