Answer:
6s⁹t³
Step-by-step explanation:
6s⁵t ₓ s⁴t² =
= 6ₓs⁵⁺⁴t¹⁺²
= 6s⁹t³
[tex]6 {s}^{5} t \times {s}^{4} {t}^{2} \\ = 6 {s}^{9} {t}^{3} [/tex]