There is a difference of 6.
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5 + 3 =8 and 5-3 = 2 The difference between the two numbers is 2.
8
-8 - -2 = -6
You could factor this as a difference of squares, but because 8 is not a perfect square, you would wind up with radicals in your answer: x2 - 8 = (x + √8)(x - √8) = (x + 2√2)(x - 2√2)
1/2 minus 1/8 is 3/8