Answer:
[tex]6x^2[/tex]
Step-by-step explanation:
Express as product of prime factors.
[tex]30x^2=2\times 3\times 5\times x^2[/tex]
[tex]66x^5=2\times 3\times 11\times x^5[/tex]
The greatest common factor is the product of the least powers of the common factors.
The GCF is
[tex]2\times 3\times x^2=6x^2[/tex]