Question

Выполните действия: а) 5(3mn+1)(3mn-1) б) (a^3-b^4)^2 в) (c-d)^2-(c+d)^2

Answer 1

А)5(3mn+1)(3mn-1)=5(9m^2n^2-1)=45m^2n^2-5
б)(a^3)^2-2a^3b^4+(b^4)^2=a^6-2a^3b^4+b^8/
в)(c-d-(c+d))(c-d+c+d)=(c-d-c-d)2c=(-2d)2c

Answer 2

A) 5*(9m^2*n^2-1)=45m^2*n^2-5
б) a^6-b^8
в) c^2-2cd+d^2-c^2-2cd-d^2=2c^2-4cd