Question

By what factor must you multiply a number in order to double its square root? With an example.

Answer 1

Suppose it is x = the number

 Suppose that h is the factor by which we want to multiply the number to double its square root.
 So we have to:

 √ (hx) = 2√x.

 We solve the equation for us and that:

 hx = 4x
 h = 4.

 You must multiply by 4 to duplicate the square root