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9x3 is also 9+9+9. 9x3 = 27
1) 9x3 = 3x3x3 (but that's not really simpler?) How about 1) 9+9+9, and 2) 3+3+3+3+3+3+3+3+3? #2 doesn't look too simple either. How about 9x3 = (10-1)x3 = 10x3-1x3 = 30-3 = 27? That one's nice.
Assuming you mean: (9x × x2)2 Then we can say: = (9x3)2 = 81x6
To find the sum of something means to add. Example: 9X3=27 The sum of 9x3 is 27.
(3x + 5)(3x^2 + 4)