Автор - vekin

(y-8)*(2y-1)
(3y+1)*(5y-2)
(3x+4y)*(4y-3x)

Ответ

Автор - adondash
(Y-8)*(2Y-1)=2Y^2-Y-16Y+8=2Y^2-17Y+8
(3Y+1)*(5Y-2)=15Y^2-6Y+5Y-2=15Y^2-y-2
(3x+4y)*(4y-3x)=12x*y-9x^2+16y^2-12x*y=16y^2-9x^2

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