Упростите выражение:
а) 3x * 2y + 5x * 2y + 6x * 2y;
б) $1,2a^2b + 3,2aba + 6,8aab + 8,8baa$;
в) $\frac{1}{2}xy^2x + \frac{1}{3}xyxy + \frac{1}{6}xy^2x$;
г) $1\frac{3}{5}mn^3r^8 + \frac{7}{10}n^2r^5nr^3m + \frac{3}{20}mr^7n^2rn$.
3x * 2y + 5x * 2y + 6x * 2y = 6xy + 10xy + 12xy = 28xy
$1,2a^2b + 3,2aba + 6,8aab + 8,8baa = 1,2a^2b + 3,2a^2b + 6,8a^2b + 8,8a^2b = 20a^2b$
$\frac{1}{2}xy^2x + \frac{1}{3}xyxy + \frac{1}{6}xy^2x = \frac{3}{6}x^2y^2 + \frac{2}{6}x^2y^2 + \frac{1}{6}x^2y^2 = \frac{6}{6}x^2y^2 = x^2y^2$
$1\frac{3}{5}mn^3r^8 + \frac{7}{10}n^2r^5nr^3m + \frac{3}{20}mr^7n^2rn = 1\frac{12}{20}mn^3r^8 + \frac{14}{20}mn^3r^8 + \frac{3}{20}mn^3r^8 = 1\frac{29}{20}mn^3r^8 = 2\frac{9}{20}mn^3r^8$
Пожауйста, оцените решение
