# How do you multiply #(56+11x-16x^2)*10/(15x^2-11x-56)# and state the excluded values?

##### 1 Answer

excluding

#### Explanation:

There's a

The excluded values occur at the zeros of the denominator; let's try to factor. We seek a pair of factors of

Eventually we find

We could also have used the quadratic formula to find the zeros of the denominator, which are called **poles.**

The multiplication itself is rather vacuous due to the lack of cancelling.