Предмет: Алгебра, автор: псиммст

(3x-y)(9x²+y²)(3x+y)-81x⁴

Ответы

Автор ответа: Solнышко

0

(3x-y)(9x²+y²)(3x+y)-81x⁴ = (9х² -у²)(9х² +у²) -81x^4 = (81x^4 - y^4) - 81 x^4 = -y^4

Автор ответа: гюйс

0

(3х-у)(9х^2+у^2)(3х+у)-81х^4=(9х^2-у^2)(9х^2+у^2)-81х^2=81х^4-у^4-81х^4= - у^4

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