Question

Даю 30 баллов срочно решите пожалуйста!!!!!!! 1) (-4а^2b^5)(0,5ab^3)^3 2) (a^2+15a+14)-(a^2+15a-14) 3) 9a^2b(7a^2-5ab-4b^2) 4) (5a-2b)(3a+4b) 5) (4a^3b^2-12a^2b^3):(2ab)

Answer 1

Ответ:

4) (5a-2b)(3a+4b)=15a^2+20ab-6ab-8b^2= 15a^2 +14ab-8b^2

Answer 2

1. (-4a^2b^5)(0.5ab^3)^3 = (-4a^2b^5)(0.5^3a^3b^9) = (-4a^2b^5)(0.125a^3b^9) = -0.5a^5b^14

2. (a^2 + 15a + 14) - (a^2 + 15a - 14) = a^2 + 15a + 14 - a^2 - 15a + 14 = 28

3. 9a^2b(7a^2 - 5ab - 4b^2) = 9a^2b * 7a^2 - 9a^2b * 5ab - 9a^2b * 4b^2 = 63a^4b - 45a^3b^2 - 36a^2b^3

4. (5a - 2b)(3a + 4b) = 5a * 3a + 5a * 4b - 2b * 3a - 2b * 4b = 15a^2 + 20ab - 6ab - 8b^2 = 15a^2 + 14ab - 8b^2

5. (4a^3b^2 - 12a^2b^3) / (2ab) = (4a^3b^2) / (2ab) - (12a^2b^3) / (2ab) = 2a^2b - 6ab^2