Question

necesito ayuda en esto es para dentro de 2 horas ​

Answer 1

Respuesta

1.

$\frac{3}{4} mn + \frac{1}{15} mn - \frac{2}{5} mn - \frac{5}{6} mn = \\ \frac{45}{60} mn + \frac{4}{60} mn - \frac{24}{60} mn - \frac{50}{60} mn = \\ - \frac{25}{60} mn = - \frac{5}{12} mn$

2.

$\frac{5}{12} {x}^{2} - \frac{1}{6} { x}^{2} + \frac{4}{3} {x}^{2} = \\ \frac{5}{12} {x}^{2} - \frac{2}{12} + \frac{16}{12} {x}^{2} = \frac{19}{12} {x}^{2}$

3.

$\frac{2}{5} p - \frac{5}{7} p + \frac{3}{35} p = \\ \frac{14}{35} p - \frac{25}{35} p + \frac{3}{35} p = - \frac{8}{35} p$