Ответы на вопрос:
64a - a^3 = a* ( 64 - a^2) = a * ( 8 - a) * ( 8 + a ) ===================================== x^3 - 10x^2 + 25x = x * ( x^2 - 10x + 25 ) x^2 - 10x + 25 d = 100 - 4*25 = 0 x = 10 : 2 = 5 x^3 - 10x^2 + 25x = x * ( x - 5) * ( x - 5 ) ========================================
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