Ответ:

2.

1) 18x² + 24xy = 6x(3x + 4y)

2) 9a⁵ - 3a³ = 3a³(3a² - 1)

3) 7m - 7n + mx - nx = 7(m - n) + x(m - n) = (7 + x)(m - n)

3.

4x² - 16x = 0

4x(x - 4) = 0

4x = 0 ⇒ x = 0

x - 4 = 0 ⇒ x = 4

4.

6y(3y - 4) - (y - 5)(y + 4) = 18y² - 24y - y² - 4y + 5y + 20 = 17y² - 23y + 20

5.

1) (4x + 2)/15 - (x - 1)/10 = 3

(8x + 2)/30 - (3x - 3)/30 = 3

(8x + 2 - 3x + 3)/30 = 3

5x + 5 = 90

5x = 85

x = 17