Question

Преобразуйте в многочлен: (у-9)^2-3у(у+1)

Answer 1

Y^2-2*3*y+3-3y^2-3y= -2y^2-9y+3= -y(2y-9)+3

Answer 2

$(y - 9)^{2} - 3y(y+1) = y^{2} - 18y + 81 - 3 y^{2} - 3y = - 2 y^{2} - 21y + 81$

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