Подстановка условия
[src]
g^3 - p^2*g - p*g^2 + p^3 при p = 1/3
3 2 2 3
g - p *g - p*g + p
$$g^{3} - g^{2} p - g p^{2} + p^{3}$$
3 3 2 2
g + p - g*p - p*g
$$g^{3} - g^{2} p - g p^{2} + p^{3}$$
$$p = \frac{1}{3}$$
3 3 2 2
g + (1/3) - g*(1/3) - (1/3)*g
$$(1/3)^{3} - (1/3)^{2} g - (1/3) g^{2} + g^{3}$$
2
3 1 1 g
g + -- - g*-- - --
3 2 3
3 3
$$g^{3} - \frac{g^{2}}{3} - \frac{g}{9} + \left(\frac{1}{3}\right)^{3}$$
2
1 3 g g
-- + g - -- - -
27 3 9
$$g^{3} - \frac{g^{2}}{3} - \frac{g}{9} + \frac{1}{27}$$