X^2 is just a X multiplied by itself.

So it won't increase / decrease the number of prime factors.

for e.g 6 (6=2x3) has two prime factors

36 (36=2x2x3x3) also has two prime factors

Thus, # of prime factors always remains same for x, and x^2

Now coming to the question

5*X^2 has 2 prime factors

Thus 5*X will also have 2 prime factors

So, X can have at most 2 prime factors ( one of which'd be 5)

_________________

Everything is in flux, nothing stays still

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