its equal to 6
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Square root of 25 = +or- 5 Square root of -36 = +or- 6i where i is the imaginary number such that i^2=-1 Square root of 121 = +or-11 So the 8 possible answers are: -16-6i, -16+6i, -6-6i, -6+6i, 6-6i, 6+6i, 16-6i and 16+6i
(8+6i)-(2+3i)=6+3i 8+6i-2+3i=6+9i
10 + 6i and 7 + 2i = 10 + 6i + 7 + 2i = 17 + 8i
60
6.3246 (rounded)