Answer :

The greatest common factor of the expressions 75x, 45x^5, and 15x^3 is 15x. To find the greatest common factor (GCF) of three univariate monomials,

we need to identify the common factors of the coefficients and variables in each expression. In this case, the coefficients are 75, 45, and 15, which have a common factor of 15. The variables are x, x^5, and x^3, which have a common factor of x. We can see that the highest power of 'x' that appears in all three expressions is 'x' raised to the power of 1. Therefore, the GCF of the three expressions is 15x.

Thus, the GCF of 75x, 45x^5, and 15x^3 is 15x.

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