Question

Люди умоляю помогите, второй раз прошу... ​

Answer 1

Объяснение:

1)

$\frac{3}{m} + \frac{5}{n} = \frac{3n + 5m}{mn}$

2)

$\frac{4y}{xy} - \frac{3}{xy} = \frac{4y - 3}{xy}$

3)

$\frac{28}{36ab} - \frac{39}{36ab} = - \frac{11}{36ab}$

4)

$\frac{6p \times 12xy}{60x {}^{2} {y}^{2} } + \frac{4k \times 20x}{60 {x }^{2} {y}^{2} } - \frac{3m \times 15y}{60x {}^{2} {y}^{2} } = \frac{72xyp + 80xk - 45ym}{60x {}^{2} {y}^{2} }$

5)

$\frac{m(2n - 5m)}{mn} + \frac{6n {}^{2} + 5m {}^{2} }{mn} = \frac{2mn - 5m {}^{2} + 6n {}^{2} + 5m {}^{2} }{mn} = \frac{2mn + 6n {}^{2} }{mn} = \frac{n(2m + 6n)}{mn} = \frac{2m + 6n}{m}$

6)

$\frac{6 {x}^{2} - 3x + 2 }{ {x}^{2}y } - \frac{3xy - 2y}{x {}^{2}y } = \frac{6 {x}^{2} - 3x + 2 - 3xy + 2y }{ {x}^{2}y }$