Answer:
-210
Step-by-step explanation:
The binary for -1 is 11111111
The positive value of 11111111 is:
2^7 + 2^6 + 2^5 + 2^4 + 2^3 + 2^2 + 2^1 + 2^0 =
128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 =
192 + 48 + 12 + 3 =
240 + 15 = 255
The positive value of 00101110 is:
0 + 0 + 2^5 + 0 + 2^3 + 2^2 + 2^1 + 0 =
2^5 + 2^3 + 2^2 + 2^1 =
32 + 8 + 4 + 2 =
40 + 6 = 46
255 - 46 = 209 ==> find the difference between the values of the binaries
11111111 and 00101110
-1 - 209 =
-(1 + 209) = -210