(-6n-0,3)^2; 16b^4+24b2c2+9c^4; (1,1d-8)(8+1,1d); 100m^2 -81n^6; 0,4...

Question

(-6n-0,3)^2; 16b^4+24b2c2+9c^4; (1,1d-8)(8+1,1d); 100m^2 -81n^6; 0,4 (10-5d)+(11d+2)(11d-2) помогите решить

Answer 1

1) (-6n-0,3)²=(6n+0,3)²=(6n)²+2·6n·0,3+(0,3)²=36n²+3,6n+0,09
2) 16b^4+24b2c2+9c^4=(4b²+3c²)²
3) (1,1d-8)(8+1,1d)=(1,1d)²-8²=1,21d²-64
4) 100m^2 -81n^6=(10m)²-(9n³)²=(10m-9n³)(10m+9n³)
5) 0,4 (10-5d)+(11d+2)(11d-2) =4-2d+121d²-4=121d²-2d