Answer:
4
Step-by-step explanation:
Square root of a number can be found by using two methods.
One is prime factorization and other is long division method.
In prime factorization method, we have to make pairing of 2
For example square root of [tex]x^{2}[/tex] is x
[tex]\sqrt{x^{2} }[/tex]= x
We have to find the double of square root than we have to multiply by 4 i.e, a pair of 2
square root of 4[tex]x^{2}[/tex] is 2x
Hence, the correct answer is we have to multiply by 4
