Two Binomial expression a+b and c+d subtraction can pass two allocation rates receive:

(a+b)(c+d)=a(c+d)+b(c+d)=ac+ad+bc+bd

The product of two biometrics Binomial expression ax+b and cx+d is:

(ax+b)(cx+d)=ac x^2+(ad+bc)x+bd

Example

(x - 2) × (x - 2) = x^2 - 4x +4 = Binomial expression

Binomial expression = ( 6x² + 3x - 8x - 4 ) = 6x² - 5x - 4.