Suppose the number is x.
Then x2 + 12 = 7x
So that x2 - 7x + 12 = 0
ie (x - 3)(x - 4) = 0
So the two possible solutions are x = 3 and x = 4
4
The number is 3 or 4.
3 or 4.
128
12y
4
The number is 3 or 4.
3 or 4.
84
84
it is approximately 8.5.
128
1764
12y
Twelve times seven equals 84.
The square root is the number which is times by itself, to get the square number.
A square paper can not be folded more than seven times.