in first example it says 10^4 = --- * --- * --- * ----
there are 4 solutions so we take 4th root to 10^4 which = 10
so 10^4 = 10 * 10 *10 *10
in second example it says 8/27 = ---- * ----- * -----
there are 3 solutions so we take 3th root to 8/27 which = 2/3
so 8/27 = 2*3 * 2/3 * 2/3
the third example it says 64 = --- *---- *------
3 solutions so we take 3th root to 64 which is = 4
so 64 = 4 * 4 * 4