Question

what number squared equals 1.5

Answer 1

I am pretty sure its 1.224 to be rounded up. 
because 1.224 x 1.224 = 1.498176 

Answer 2

you have to find out what is the square root of 1.5 is which is 1.22474487139 by calculator to make sure of this, do answer squared and you will get 1.5