Decomposition factor: (3x-2y) ^ 2-4 (3x-2y) + 4

Decomposition factor: (3x-2y) ^ 2-4 (3x-2y) + 4

The original formula = (3x-2y) & sup2; - 2 × (3x-2y) × 2 + 2 & sup2; using the complete square formula
=[(3x-2y)-2]²
=(3x-2y-2)²