Answer:
(1). [tex]5^{4}[/tex] × [tex]13^{7}[/tex] ; (2). 3 - 5x
Step-by-step explanation:
1). [( - 5 )³ · ( - 5 )] ( [tex]13^{-2}[/tex] · [tex]13^{9}[/tex] ) = [tex](-5)^{3+1}[/tex] × [tex](13)^{-2+9}[/tex] = [tex](-5)^{4}[/tex] × [tex]13^{7}[/tex] = [tex]5^{4}[/tex] × [tex]13^{7}[/tex]
2). - 25x² ÷ 5x + 15x ÷ 5x = 3 - 5x
