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Answer:
A. [tex]x^5[/tex]
Step-by-step explanation:
We are asked to find the greatest common factor of [tex]19x^7[/tex] and [tex]3x^5[/tex].
Factors of [tex]19x^7[/tex]: [tex]19\cdot x^5\times x^2[/tex]
Factors of [tex]3x^5[/tex]: [tex]3\cdot x^5[/tex]
We can see that both terms share a common factor that is [tex]x^5[/tex], therefore, the greatest common factor of both terms is [tex]x^5[/tex].