Question

ДАЮ 30 БАЛЛОВ, ПОМОГИТЕ СОКРАТИТЬ ДРОБИ

Answer 1

Ответ:

2a) $\frac{3a + 3b}{5(a+b)} = \frac{3(a+b)}{5(a+b)} = \frac{3}{5} = 0,6$

2б) $\frac{7x-14y}{3x-6y} = \frac{7(x-2y)}{3(x-2y)} = \frac{7}{3} = 2\frac{1}{3}$

2в) $\frac{5a-20c}{15ac} = \frac{5(a-3c)}{15ac} = \frac{a-3c}{3ac}$

2г) $\frac{x-2b}{x^2-2bx} = \frac{x-2b}{x(x-2b)} = \frac{1}{x}$

3a) $\frac{2(x-y)}{x(y-x)} = -\frac{2}{x}$

3б) $\frac{3c - 9d}{6d-2c} = \frac{3(c-3d)}{2(3d-c)} = -\frac{3}{2} = -1,5$

3в) $\frac{a^2-2ab}{6b-3a} = \frac{a(a-2b)}{3(2b-a)} = -\frac{a}{3}$

3г) $\frac{m^3-5m^2n}{5n^3 - mn^2} = \frac{m^2(m-5n)}{n^2(5n-m)}= -\frac{m^2}{n^2}$