Question

пж помогите решение 35.2 даю 100 баллов срочно нужен ​

Answer 1

Ответ:

$1)\ \ (1,1x^2-6y)^2-(1,1x^2-6y)(1,1x^2+6y)=\\\\=(1,1x^2-6y)\Big((1,1x^2-6y)-(1,1x^2+6y)\Big)=(1,1x^2-6y)(-12y)=\\\\=-13,2x^2y+72y^2\\\\\\2)\ \ (2,3a-7b^3)(2,3a+7b^3)-(2,3a+7b^3)^2=\\\\=(2,3a+7b^3)\Big((2,3a-7b^3)-(2,3a+7b^3)\Big)=(2,3a+7b^3)(-14b^3)=\\\\=-32,2ab^3-98b^6$

$3)\ \ (3,1n^3-5m)^2+(5m-3,2n^3)(5m+3,2n^3)=\\\\=(5m-3,1n^3)^2+(5m-3,2n^3)(5m+3,2n^3)=\\\\=(5m-3,1n^3)\Big((5m-3,1n^3)+(5m+3,1n^3)\Big)=(5m-3,1n^3)\cdot 10m=\\\\=50m^2-31mn^3$