1. (3a+b) (2a-5b) - 6 (a-b) ^2 2. (-2a^3 b) ^3 * (-5a^2 b) ^2 3. ab+ac-a 4.4a^2-b^2+2a-b 5. Решите уравнение: (a+1) (a-1) * x=a+1

1. (3a + b) (2a - 5b) - 6 (a - b) ^2.

(6a^2 - 15ab + 2ab - 5b^2) - 6 (a^2 - 2ab + b^2).

6a^2 - 15ab + 2ab - 5b^2 - 6a^2 + 12ab - 6b^2.

-11a^2 + ab.

2. (-2a^3 b) ^3 * (-5a^2 b) ^2

-8a^9 b^3 * 25a^4 b^2.

-625a^13 b^5.

3. ab + ac - a.

a (b + c - a).

4.4a^2 - b^2 + 2a - b.

2ab (a - b).

5. (a + 1) (a - 1) * x = a + 1.

x = a + 1 / (a + 1) (a - 1).

x = (a - 1) ^-1.