Question

Помогите пожалуйста ​

Answer 1

Пошаговое объяснение:

2) a)

$\frac{x}{9 {y}^{2} }$

б)

$\frac{2x(x - 3)}{4x} = \frac{x - 3}{2}$

в)

$\frac{3(x + 1)}{(x + 1)(x + 1)} = \frac{3}{x + 1}$

г)

$\frac{(3y + 1)(6 {y}^{2} - 3y + 1)}{(1 - 3y)(1 + 3y)} = \frac{6 {y}^{2} - 3y + 1 }{1 - 3y}$

3) а)

$\frac{7b - 3 - 3b + 2}{4b - 1} = \frac{4b - 1}{4b - 1} = 1$

б)

$\frac{x(x + 4) - 4(x - 2)}{4 {x}^{2} } = \frac{ {x}^{2} + 8 }{4 {x}^{2} }$

в)

$\frac{5a {}^{2} - 5ab }{ab(a + b)} = \frac{5a(a - b)}{ab(a + b)} = \frac{ 5(a - b)}{b(a + b)}$

4)

$\frac{ (a - 4b)(a + 4b)}{(a + 4b)(a + 4b)} = \frac{18 - 4 \times ( - 7.5)}{18 + 4 \times ( - 7.5)} = \frac{18 - 30}{18 + 30} = \frac{ - 12}{48} = - \frac{1}{4} = - 0.25$