Преобразуйте в многочлен выражение (a-3)^2-a(a+1)
(a-3)^2-a(a+1)=
=a^2 - 6a +9 -a^2 -a=
= -7a+9
(a-3)^2-a(a+1)=a^2-6a+9-a^2-a=9-7a
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(a-3)^2-a(a+1)=
=a^2 - 6a +9 -a^2 -a=
= -7a+9
(a-3)^2-a(a+1)=a^2-6a+9-a^2-a=9-7a