Which statement is true about polynomial 5s^6t^2 + 6st^9 - 8s^6t^2 - 6t^7 after it has been fully simplified?

all I know is that there are 4 terms : ^)

Answer: 3t² (2st⁷ - s⁶ - 2t⁵)

Step-by-step explanation:

5s⁶t² + 6st⁹ - 8s⁶t² - 6t⁷ 5s⁶t² and - 8s⁶t² are like terms which = - 3s⁶t² when combined

= 6st⁹ - 3s⁶t² - 6t⁷ next, factor out the GCF of 3t²

= 3t² (2st⁷ - s⁶ - 2t⁵)