Разложение на множители
[src]
/ _____\ / _____ _____\ / _____ _____\
| 2/3 3 ___ 3 / 2 | | 2/3 3 ___ 3 / 2 2/3 5/6 3 / 2 | | 2/3 3 ___ 3 / 2 2/3 5/6 3 / 2 |
| 2 *\/ 3 *\/ -y | | 2 *\/ 3 *\/ -y I*2 *3 *\/ -y | | 2 *\/ 3 *\/ -y I*2 *3 *\/ -y |
1*|x - -------------------|*|x + ------------------- + --------------------|*|x + ------------------- - --------------------|
\ 3 / \ 6 6 / \ 6 6 /
$$1 \left(x - \frac{2^{\frac{2}{3}} \cdot \sqrt[3]{3} \sqrt[3]{- y^{2}}}{3}\right) \left(x + \left(\frac{2^{\frac{2}{3}} \cdot \sqrt[3]{3} \sqrt[3]{- y^{2}}}{6} + \frac{2^{\frac{2}{3}} \cdot 3^{\frac{5}{6}} i \sqrt[3]{- y^{2}}}{6}\right)\right) \left(x + \left(\frac{2^{\frac{2}{3}} \cdot \sqrt[3]{3} \sqrt[3]{- y^{2}}}{6} - \frac{2^{\frac{2}{3}} \cdot 3^{\frac{5}{6}} i \sqrt[3]{- y^{2}}}{6}\right)\right)$$
((1*(x - 2^(2/3)*3^(1/3)*(-y^2)^(1/3)/3))*(x + (2^(2/3)*3^(1/3)*(-y^2)^(1/3)/6 + i*2^(2/3)*3^(5/6)*(-y^2)^(1/3)/6)))*(x + (2^(2/3)*3^(1/3)*(-y^2)^(1/3)/6 - i*2^(2/3)*3^(5/6)*(-y^2)^(1/3)/6))
Подстановка условия
[src]
81*x^6 + 72*x^3*y^2 + 16*y^4 при y = 1/3
6 3 2 4
81*x + 72*x *y + 16*y
$$81 x^{6} + 72 x^{3} y^{2} + 16 y^{4}$$
4 6 3 2
16*y + 81*x + 72*x *y
$$81 x^{6} + 72 x^{3} y^{2} + 16 y^{4}$$
$$y = \frac{1}{3}$$
4 6 3 2
16*(1/3) + 81*x + 72*x *(1/3)
$$81 x^{6} + 72 (1/3)^{2} x^{3} + 16 (1/3)^{4}$$
16 3 6
-- + 8*x + 81*x
81
$$81 x^{6} + 8 x^{3} + \frac{16}{81}$$