Ok, so
We want to simplify the product:
[tex](4t^2+7t)(-3t^2+4)[/tex]For this, we have to multiply each term by all the terms inside the other bracket as follows:
[tex]\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}[/tex]In descending order:
[tex]-12t^4-21t^3+16t^2+28t[/tex]And, the degree of our simplified answer is 4.
The simplified answer can be written as:
-12t^4-21t^3+16t^2+28t