121 x 121
+5 or -5.
the product of 15 and a number by its self four times.
about 31.6227766017, or 10 times the square root of 10
1 and it self
Because for a number to be a square number it must have a number which when multiplied by it self=that number. For example: 36 is a square number because 6x6=36 16 is a square number because 4x4=16 A negative number such as -16 is not a Square Number because -4x-4=16 not -16 because a negative times a negative is a positive. -4x4=-16 but these numbers aren't the same therefore -16 isn't a square number. This is why negative numbers cant be Square Numbers
The answer is 20.
+5 or -5.
There are two of them that do that: -108 and +108 .
351364184.12760046280601855807206 multiplied by itself gives you 123456789887654321.
15.556349186
100
the product of 15 and a number by its self four times.
Any number can be multiplied by itself, but one is unique in that it stays the same. 1x1 is 1
a number multiplied it self 3 times so 5x5x5 or 53
The number zero! Multiplied by itself = 0 x 0 = 0 Added to itself = 0 + 0 = 0!
about 31.6227766017, or 10 times the square root of 10
27 x 27 = 729