A = 2x-y, B = x + y, calculation: a square - 2Ab Multiplication formula | Math enthusiast | Mathematical art

A = 2x-y, B = x + y, calculation: a square - 2Ab Multiplication formula

Substituting a = 2x-y and B = x + y into a ^ 2-2ab, we get the following result:
(2x-y)^2-2(2x-y)(x+y)
=4x^2-4xy+y^2-4x^2-2xy+2y^2
=3y^2-6xy

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