Question

How do you solve `q^2+11qr+18r^2`?

Answer 1

`q^2+11qr+18r^2 = (q+9r)(q+2r)`

Explanation:

Given:

`q^2+11qr+18r^2`

Find a pair of factors of `18` with sum `11`.

The pair `9, 2` works.

Hence we find:

`q^2+11qr+18r^2 = (q+9r)(q+2r)`