Answer:
[tex]-16x^2-9x+12[/tex]
Step-by-step explanation:
To get the polynomial in standard form we look at the degree of each term
In standard form we write the degree of each term from highest to lowest
a. [tex]2x-8x^4+16x^5[/tex]
Here the degree is from lowest to highest. So it is not in standard form.
b. [tex]-16x^2-9x+12[/tex]
Here, degree is x^2 and then x. degree is from highest to lowest
So, it is in standard form
c. [tex]15x -6x^2+3[/tex]
The degree is not in order , so it is not in standard form
d. [tex]-7x^7+9x^9-11x[/tex]
The degree is not in order , so it is not in standard form
