Answer :

So we need to find the square root of 121.  so in the first box, you put 121.  Now what number multiplied times itself equals 121? 10 x 10 = 100, and 12 x 12 = 144.  So 121 is 11 x 11.  11 goes in the 2nd box.
Lieuvan119
x=±√121=±11 is your final answer. Hope it help!

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