how can you tell if a decimal is a perfect square?

Question

anonymous · Answer

the pocket protector and horn-rimmed glasses?

anonymous · Answer

isn't a perfect square a square of an integer (whole number)?

anonymous · Answer

what? a perfect square is like when it has a square root.

anonymous · Answer

all positive numbers have a square root...

anonymous · Answer

yeah i knowwww

anonymous · Answer

So if you are asking how can you tell if a decimal has a square root, the answer would be if it is positive.

anonymous · Answer

if you are asking how can you tell if a decimal is a perfect square, like .25 becomes .5, where .5 has a square root of 0.70710768..., I would convert it to a fraction.  .25 = 25/100 = 5/20 = 1/4 and then see if the numerator and denominator are both perfect squares. 1/4 yup, they are!

anonymous · Answer

okay thanks!