Answer: FIRST OPTION
Step-by-step explanation:
By definition you can classify a polynomial according to its number of terms. You can also classify it by its degree (the largest exponent is the degree).
Then, if the expression is a quadratic binomial (or a binomial of degree 2), it must have:
Therefore, based on this, you can conclude that the answer is the first option, which is shown below:
[tex]x^{2}-9x[/tex]
