When is simplified, the result is , where is an integer, and is a positive integer. If is as small as possible, then what is ?
3√[-128] =
3√[ -1 * 64 * 2] =
3√ -1 * 3√64 * 3√2 =
-1 * 4 * 3√2 =
-4 3√2
So a + b = -4 + 2 = -2