Question

скиньте пж даю 5о баллов ​

Answer 1

Объяснение:

3.

$\frac{x - 10 {y}^{3} }{2y} + 5 {y}^{2} = \frac{x - 10 {y}^{3} }{2y} + \frac{2y(5 {y ^{2} )} }{2y} = \frac{x - 10 {y}^{3} + 10 {y}^{3} }{2y} = \frac{x}{2y} = \frac{ - 18}{2(4.5)} = \frac{ - 18}{9} = - 2$

4.

1)

$\frac{7y + 4}{8y} - \frac{2y + 3}{6y} = \frac{3(7y + 4) - 4(2y + 3)}{24y} = \frac{21 {y} + 12 - 8 {y} - 12}{ 24y} = \frac{13 {y} }{24y} = \frac{13}{24}$