120*11 = 1320
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The numbers are -1 and -11 because -1 times -11 = 11 and (-1)+(-11) = -12
By Lomg Multiplication 12 x 11 120 ( 10 x 12 = 120) 12 ( 1 x 12 = 12) 132 ====
Expand z plus 11 times z plus 11 = (z+11)(z+11) = z2 + 22z + 121.
For example, -1 times 11.
Yes,121 is composite.11 times 11=121Yes; 121 is divisible by 11.