Д= 7^2-4•(-6)•3= 49+72=корень121=11
Х1=-7+11/2•3=-4/6=-0,6...
Х2=-7-11/2•3=-18/6=-3
1)4m-(3n+(7m-(8n-(3+2m))))=4m-3n+7m-8n-3-2m=4m+7m-2m-3n-8n-3=11m-2m-11n-3=9m-11n-3
2)a-(2b-(3a-(4b-(1-2a))))=a-2b-3a-4b-1+2a=a-3a+2a-2b-4b-1=-2a+2a-2b-4b-1=6b-1
2^2k+5 * 3^3+k / 2^k+2 * 3^k+2 * 2^k+2 = 2^2k+5-k-2 * 3^3+k-k-2 / 2k+2 = 2^k+3 * 3^1 / 2^k+2 = 2^k+3-k-2 * 3^1 = 2^1 * 3^1 = 6
Корень (2097,64-1953,64)= корень из 144 = 12