What is the greatest common algebraic factor of the terms $8a$8a and $9a$9a?
What is the greatest common algebraic factor of the terms $9ax$9ax and $8ba$8ba?
What is the greatest common algebraic factor of the terms $3mxy$3mxy and $13mxb$13mxb?
What is the greatest common algebraic factor of the terms $12b$12b and $15b^2x$15b2x?