Respuesta :

Answer:  The greatest common factor of this expression is 6x², because 6x could be divided from 12x⁴ and from 18x².

Step-by-step explanation:

I'll just factor the expression to show you :

12x⁴ + 18x²

6x²(2x²+3x)

So, once again, your greatest common factor is 6x²

~Hope I helped!~