Ok, so
We want to simplify the product:
![(4t^2+7t)(-3t^2+4)](https://img.qammunity.org/2023/formulas/mathematics/college/dcu0g5nzlxo4o49kiun4675b2v93xya9hh.png)
For this, we have to multiply each term by all the terms inside the other bracket as follows:
![\begin{gathered} (4t^2)(-3t^2)+(4t^2)(4)+(7t)(-3t^2)+(7t)(4) \\ -12t^4+16t^2-21t^3+28t \\ -12t^4+16t^2-21t^3+28t \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/1hicyryc5fqavfv8tj14182mo3w4k7nwvs.png)
In descending order:
![-12t^4-21t^3+16t^2+28t](https://img.qammunity.org/2023/formulas/mathematics/college/4a5z3zzgh5aoegunn5l0ynw0rwrofotrsz.png)
And, the degree of our simplified answer is 4.
The simplified answer can be written as:
-12t^4-21t^3+16t^2+28t