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Footlit3846
@Footlit3846
November 2021
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Помогите решить #103 под цифрой 7,8,9.
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ЭллисЛинк
7. (-a-1)(a^3+5) = -a^4-5a-а^3-5 = -а^4-а^3-5а-5
8. (2m^2-3n)(3m^2+2n) = 6m^4+4m^2n-9m^2n-6n^2 = 6m^4-5m^2n-6n^2
9. (x-6)(x^2+2x-3) = x^3+2x^2-3x-6x^2-12x+18 = x^3-4x^2-15x+18
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Answers & Comments
8. (2m^2-3n)(3m^2+2n) = 6m^4+4m^2n-9m^2n-6n^2 = 6m^4-5m^2n-6n^2
9. (x-6)(x^2+2x-3) = x^3+2x^2-3x-6x^2-12x+18 = x^3-4x^2-15x+18