143
They add up to 121
(1) Take the difference of the two previous numbers in sequence (2) Add 4 to this difference. (3) Take the number from step #2 and add it to the previous number in the sequence. For example, to find the next number in the sequence: (1) 121 - 90 = 31 (2) 31 + 4 = 35 (3) 121 + 35 = 156
121 multiplied by 121 is 14,641.
121 to the second power means 121 times 121. 1212 = 121 * 121 = 14,641
Add 200 to it because 121 plus 200 = 321
sum means add up so 121 + 7 = 128
The number is 55+66 = 121
99
143
They add up to 121
Do you mean? X^2 - 121 = 0 add 121 to each side X^2 = 121 take square root of each side x = (+/-) 11
44 + 77 = 121
-121
-1 and -120
57+64= 121
112 + 32 = 121 + 9 = 130