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five
256.
the answer is 256:]
-4, +4, -4i and 4i
4^4=256
Four to the fourth power is equal to 256.
4 or -4 to the fourth power equal 256
256
4^4 = 256
16*16 = 256
44 = 256
Do you mean: x8 = 256 If so: x = 2 because 28 = 256