Question 1125691

{{{((x+4)-2y)^2}}}

={{{(x - 2y + 4)^2}}}

={{{(x - 2y + 4)(x - 2y + 4)}}}


={{{x^2-2yx+4x-2yx+4y^2-8y+4x-8y+16}}}

={{{x^2+8x+16-4yx-16y+4y^2}}}