Разложение на множители
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/ / ___\\ / / ___\\
/ 6*y\ | |1 I*\/ 3 || | |1 I*\/ 3 ||
1*|x + ---|*|x - 6*y*|-- - -------||*|x - 6*y*|-- + -------||
\ 5 / \ \10 10 // \ \10 10 //
$$1 \left(x + \frac{6 y}{5}\right) \left(x - 6 y \left(\frac{1}{10} - \frac{\sqrt{3} i}{10}\right)\right) \left(x - 6 y \left(\frac{1}{10} + \frac{\sqrt{3} i}{10}\right)\right)$$
((1*(x + 6*y/5))*(x - 6*y*(1/10 - i*sqrt(3)/10)))*(x - 6*y*(1/10 + i*sqrt(3)/10))
Подстановка условия
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125*x^3 + 216*y^3 при y = -3
$$125 x^{3} + 216 y^{3}$$
$$125 x^{3} + 216 y^{3}$$
$$y = -3$$
$$216 (-3)^{3} + 125 x^{3}$$
$$125 x^{3} - 5832$$