For this case we have the following quadratic equation:

Where:

We look for the solution using the following formula:

Substituting the values:

Thus, we have two roots:

Answer:

The answer is 15!
Hope this helps!
2(x+x) would be your best bet
The answer is <span>B. monomial.
7x + 3x - x = 10x - x = 9x
There is only one term (9x), so the polynomial is actually monomial (mono- = one)</span>