8.831760866327848
They can, but they are called imaginary numbers. This is because a "square" of something is the number that, when multiplied by itself, will equal the first number. A negative multiplied by a negative equals a positive, and positives can't turn into negatives on their own, so there are no square roots of negative numbers.
Anything multiplied by one is itself.
25.6125
13, -13
A number multiplied by itself added to itself equals 30. What are the two possible numbers?
There is no such number.
8.831760866327848
They can, but they are called imaginary numbers. This is because a "square" of something is the number that, when multiplied by itself, will equal the first number. A negative multiplied by a negative equals a positive, and positives can't turn into negatives on their own, so there are no square roots of negative numbers.
18
3.464101615
8.3066239
10.95445115010332
6.2449979983983982058468931209398
Anything multiplied by one is itself.
25.6125
One multiplied by one equals one. This is because any number that is multiplied by one equals itself. In this case, it equals one.