Ответ:
(х - 1) * (х^2 + х + 1) + (3 - х) * (9 + 3х + х^2) = x * (х^2 + х + 1) - 1 * (х^2 + х + 1) + 3 * (9 + 3х + х^2) - x * (9 + 3х + х^2) = x^3 + x^2 + x - x^2 - x - 1 + 27 + 9x + 3x^2 - 9x - 3x^2 - x^3 = x^3 + (x^2 - x^2) + (x - x) - 1 + 27 + (3x^2 - 3x^2) + (9x - 9x) - x^3 = x^3 - x^3 - 1 + 27 = 26
Пошаговое объяснение:
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Ответ:
(х - 1) * (х^2 + х + 1) + (3 - х) * (9 + 3х + х^2) = x * (х^2 + х + 1) - 1 * (х^2 + х + 1) + 3 * (9 + 3х + х^2) - x * (9 + 3х + х^2) = x^3 + x^2 + x - x^2 - x - 1 + 27 + 9x + 3x^2 - 9x - 3x^2 - x^3 = x^3 + (x^2 - x^2) + (x - x) - 1 + 27 + (3x^2 - 3x^2) + (9x - 9x) - x^3 = x^3 - x^3 - 1 + 27 = 26
Пошаговое объяснение:
1.) (x-1)(x2+x+1)+(3-x)(9+3x+x2)=x3-1+3^3-x3=-1+27=26
2.) (x+2)(x2-2x+4)-x(x-3)(x+3)=x3+2^3-x(x2-9)=x3+8-x3+9x=9x+8