i have no idea what it is but i think its something you multiply by itself and you will get the answer.
How about: 2*320 = 640
6x7
When you multiply two numbers, you get the product
-1
240 and 1
How about: 2*320 = 640
The two numbers that multiply to make 40 and add to make -13 are -8 and -5. When you multiply -8 and -5, you get 40, and when you add them together, you get -13.
There's only one number that equals 640. The number is . . . . . 640.
5 and -3
6x7
9
199
When you multiply two numbers, you get the product
-1
38 and 8
240 and 1
21 and 5