Выполните действия:
а) $18a^2 * \frac{a^2 - 3a + 1}{9} - 2a * \frac{a^3 - 3a^2 + a}{0,4} + a^4 - 3a^3 + a^2$;
б) $12x * \frac{x + y}{6} - 27y * \frac{2x - y}{9} - y(y + 1)$;
в) $33c^3 * \frac{c + 1}{11} - 10c * \frac{c^3 - 5c^2 + c}{5} + c^4 - 3c$;
г) $28p^2 * \frac{p^2 + 5p - 1}{0,7} - 3p * \frac{p^3 + 5p^2 - p}{0,1} + 2p^4 + 10p^3 - 2p^2$.
$18a^2 * \frac{a^2 - 3a + 1}{9} - 2a * \frac{a^3 - 3a^2 + a}{0,4} + a^4 - 3a^3 + a^2 = 2a^2(a^2 - 3a + 1) - 5a(a^3 - 3a^2 + a) + a^4 - 3a^3 + a^2 = 2a^4 - 6a^3 + 2a^2 - 5a^4 + 15a^3 - 5a^2 + a^4 - 3a^3 + a^2 = -2a^4 + 6a^3 - 2a^2$
$12x * \frac{x + y}{6} - 27y * \frac{2x - y}{9} - y(y + 1) = 2x(x + y) - 3y(2x - y) - y^2 - y = 2x^2 + 2xy - 6xy + 3y^2 - y^2 - y = 2x^2 + 2y^2 - 4xy - y$
$33c^3 * \frac{c + 1}{11} - 10c * \frac{c^3 - 5c^2 + c}{5} + c^4 - 3c = 3c^3(c + 1) - 2c(c^3 - 5c^2 + c) + c^4 - 3c = 3c^4 + 3c^3 - 2c^4 + 10c^3 - 2c^2 + c^4 - 3c = 2c^4 + 13c^3 - 2c^2 - 3c$
$28p^2 * \frac{p^2 + 5p - 1}{0,7} - 3p * \frac{p^3 + 5p^2 - p}{0,1} + 2p^4 + 10p^3 - 2p^2 = 40p^2(p^2 + 5p - 1) - 30p(p^3 + 5p^2 - p) + 2^4 + 10p^3 - 2p^2 = 40p^4 + 200p^3 - 40p^2 - 30p^4 - 150p^3 + 30p^2 + 2p^4 + 10p^3 - 2p^2 = 12p^4 + 60p^3 - 12p^2$
Пожауйста, оцените решение
