Question

плиииз помогите срочно <3​

Answer 1

(а-3b)^3 = a^3 - 9a^2b + 27ab^2 - b^3

(2a+b)^3 = 8a^3 + 12a^2b + 6ab^2 + b^3

(5+2b)^3 - (b+5)^2 = 125 + 150b + 60b^2 + 8b^3 - b^2 - 10b - 25 = 8b^3 + 59b^2 + 140b + 100

(a-2b)^2 - (2+3b)^3 = a^2 - 4ab + 4b^2 - 8 - 36b - 54b^2 - 27b^3 = -(27b^3 + 50b^2 + 4ab - a^2 + 8)