## Dividing Polynomials by Binomials

Read the section on dividing a polynomial by a binomial. Pay attention to the review of long division, since it will help you understand the technique. Review the solution to example 6.84 to see how to divide a trinomial by a binomial. Then, review the solution to example 6.85 to see how we handle dividing by a subtraction binomial. Be careful, and make sure you keep track of the negative sign.

After you study these examples, complete questions 6.167 through 6.170 in the Try It section.

### TRY IT 6.167-6.170

##### TRY IT 6.167

Find the quotient: $\left(y^{2}+10 y+21\right) \div(y+3)$.

##### TRY IT 6.168

Find the quotient: $\left(m^{2}+9 m+20\right) \div(m+4)$.

##### TRY IT 6.169

Find the quotient: $\left(2 x^{2}-3 x-20\right) \div(x-4)$.

##### TRY IT 6.170

Find the quotient: $\left(3 x^{2}-16 x-12\right) \div(x-6)$.