Подайте у вигляді добутку многочлен:
a)3x^3+3y^3
b)(m^2-2m)^2-1
c)x2-18xy+81y^2-z^2
a)3x^3+3y^3
b)(m^2-2m)^2-1
c)x2-18xy+81y^2-z^2
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Решение смотри на фотографии(m^2-2m+1)=(m^2-2m-1)(m-1)(m-1)
c)x^2-18xy+81y^2-z^2=
(x^2-2•x•9y+(9y)^2)-z^2=
(x-9y)^2-z^2=
(x-9y-z)(x-9y+z)
a)3x^3+3y^3=3(x^3+y^3)=
3(x+y)(x^2-xy+y^2)