(3.65 x 3.65 + 2.35 x 2.35 - 2 x 2.35 x 3.65) / 1.69 =?

Given expression
=[(3.65)² + (2.35)² -2 x 3.65 x 2.35 ] / 1.69
=a² + b² - 2ab / 1.69, Where a = 3.65 and b = 2.35
=(a - b)² / 1.69
= (3.65 - 2.35)² / 1.69
= (1.3)² / 1.69
= 1.69 / 1.69
= 1