# Solving polynomials with the unknown "b" from ${ax^2+bx+c}$

### Solving polynomials with the unknown "b" from ${ax^2+bx+c}$

In this section, we will learn how to find all the possible answers to the unknown "b" in the polynomials ${ax^2 + bx+c}$. Similar to the earlier sections in this chapter, we are going to apply trinomial factoring to reverse the process of FOIL to solve the problems.

#### Lessons

• 1.
Determine all integers k of the following trinomials.
a)
${2x^2+kx-5}$

b)
${3x^2+kx+4}$