Разложение на множители
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/ _____________________ \ / _____________________ \ / _____________________\
| / ________ / ___\| | / ________ / ___\| | / ________ |
| / 1732 3*\/ 112461 | 1 I*\/ 3 || | / 1732 3*\/ 112461 | 1 I*\/ 3 || | / 1732 3*\/ 112461 |
| 3 / ---- + ------------ *|- - - -------|| | 3 / ---- + ------------ *|- - + -------|| | 3 / ---- + ------------ |
| 8 43 \/ 5 5 \ 2 2 /| | 8 43 \/ 5 5 \ 2 2 /| | 8 43 \/ 5 5 |
1*|p + - + -------------------------------------------- + ------------------------------------------|*|p + - + -------------------------------------------- + ------------------------------------------|*|p + - + ---------------------------- + --------------------------|
| 3 _____________________ 3 | | 3 _____________________ 3 | | 3 _____________________ 3 |
| / ___\ / ________ | | / ___\ / ________ | | / ________ |
| | 1 I*\/ 3 | / 1732 3*\/ 112461 | | | 1 I*\/ 3 | / 1732 3*\/ 112461 | | / 1732 3*\/ 112461 |
| 3*|- - - -------|*3 / ---- + ------------ | | 3*|- - + -------|*3 / ---- + ------------ | | 3*3 / ---- + ------------ |
\ \ 2 2 / \/ 5 5 / \ \ 2 2 / \/ 5 5 / \ \/ 5 5 /
$$1 \left(p + \left(\frac{8}{3} + \frac{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{3 \sqrt{112461}}{5} + \frac{1732}{5}}}{3} + \frac{43}{3 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{3 \sqrt{112461}}{5} + \frac{1732}{5}}}\right)\right) \left(p + \left(\frac{8}{3} + \frac{43}{3 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{3 \sqrt{112461}}{5} + \frac{1732}{5}}} + \frac{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{3 \sqrt{112461}}{5} + \frac{1732}{5}}}{3}\right)\right) \left(p + \left(\frac{43}{3 \sqrt[3]{\frac{3 \sqrt{112461}}{5} + \frac{1732}{5}}} + \frac{8}{3} + \frac{\sqrt[3]{\frac{3 \sqrt{112461}}{5} + \frac{1732}{5}}}{3}\right)\right)$$
((1*(p + (8/3 + 43/(3*(-1/2 - i*sqrt(3)/2)*(1732/5 + 3*sqrt(112461)/5)^(1/3)) + (1732/5 + 3*sqrt(112461)/5)^(1/3)*(-1/2 - i*sqrt(3)/2)/3)))*(p + (8/3 + 43/(3*(-1/2 + i*sqrt(3)/2)*(1732/5 + 3*sqrt(112461)/5)^(1/3)) + (1732/5 + 3*sqrt(112461)/5)^(1/3)*(-1/2 + i*sqrt(3)/2)/3)))*(p + (8/3 + 43/(3*(1732/5 + 3*sqrt(112461)/5)^(1/3)) + (1732/5 + 3*sqrt(112461)/5)^(1/3)/3))
Подстановка условия
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p^3 + 8*p^2 + 7*p + 32/5 при p = 3/2
3 2 32
p + 8*p + 7*p + --
5
$$p^{3} + 8 p^{2} + 7 p + \frac{32}{5}$$
32 3 2
-- + p + 7*p + 8*p
5
$$p^{3} + 8 p^{2} + 7 p + \frac{32}{5}$$
$$p = \frac{3}{2}$$
32 3 2
-- + (3/2) + 7*(3/2) + 8*(3/2)
5
$$(3/2)^{3} + 8 (3/2)^{2} + 7 (3/2) + \frac{32}{5}$$
$$\frac{1531}{40}$$
Объединение рациональных выражений
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3 2
32 + 5*p + 35*p + 40*p
------------------------
5
$$\frac{5 p^{3} + 40 p^{2} + 35 p + 32}{5}$$
(32 + 5*p^3 + 35*p + 40*p^2)/5