Разложение на множители
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/ ___\ / ___\
| 7 3*\/ 7 | | 7 3*\/ 7 |
1*|d + - - + -------|*|d + - - - -------|
\ 2 2 / \ 2 2 /
$$1 \left(d - \left(- \frac{3 \sqrt{7}}{2} + \frac{7}{2}\right)\right) \left(d - \left(\frac{7}{2} + \frac{3 \sqrt{7}}{2}\right)\right)$$
(1*(d - (7/2 + 3*sqrt(7)/2)))*(d - (7/2 - 3*sqrt(7)/2))
Подстановка условия
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(d - 1*8)*(d + 4) + (d - 1*5)^2 при d = 1
2
(d - 8)*(d + 4) + (d - 5)
$$\left(d + 4\right) \left(d - 8\right) + \left(d - 5\right)^{2}$$
$$2 d^{2} - 14 d - 7$$
$$d = 1$$
$$2 (1)^{2} - 14 (1) - 7$$
$$\left(-14\right) 1 - 7 + 2 \cdot 1^{2}$$
$$-19$$
25.0*(-1 + 0.2*d)^2 + (4.0 + d)*(-8.0 + d)
25.0*(-1 + 0.2*d)^2 + (4.0 + d)*(-8.0 + d)
Рациональный знаменатель
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2 2
-32 + d + (-5 + d) - 4*d
$$d^{2} + \left(d - 5\right)^{2} - 4 d - 32$$
2
(-5 + d) + (-8 + d)*(4 + d)
$$\left(d - 8\right) \left(d + 4\right) + \left(d - 5\right)^{2}$$
(-5 + d)^2 + (-8 + d)*(4 + d)
2
(-5 + d) + (-8 + d)*(4 + d)
$$\left(d - 8\right) \left(d + 4\right) + \left(d - 5\right)^{2}$$
(-5 + d)^2 + (-8 + d)*(4 + d)
Объединение рациональных выражений
[src]
2
(-5 + d) + (-8 + d)*(4 + d)
$$\left(d - 8\right) \left(d + 4\right) + \left(d - 5\right)^{2}$$
(-5 + d)^2 + (-8 + d)*(4 + d)
2
(d - 5) + (-8 + d)*(4 + d)
$$\left(d - 8\right) \left(d + 4\right) + \left(d - 5\right)^{2}$$
2
(-5 + d) + (-8 + d)*(4 + d)
$$\left(d - 8\right) \left(d + 4\right) + \left(d - 5\right)^{2}$$
(-5 + d)^2 + (-8 + d)*(4 + d)