Answer:
multiplication rule of exponents
Step-by-step explanation:
[tex]\textsf{The exponent multiplication rule states: }a^b \cdot a^c=a^{b+c}[/tex]
[tex]\textsf{Therefore, the next step after }\log_b(b^x \cdot b^y) \textsf{ would be }\log_b(b^{x+y})[/tex]
