Question

How do you multiply `(7n+5)(4n+6)`?

Answer 1

`28n^2+62n+30`

Explanation:

Each term in the second bracket is multiplied by each term in the first bracket as shown below.

`(color(red)(7n+5))(4n+6)`

`=color(red)(7n)(4n+6)color(red)(+5)(4n+6)`

`=(color(red)(7n)xx4n)+(color(red)(7n)xx6)+(color(red)(5)xx4n)+(color(red)(5)xx6)`

`=28n^2+42n+20n+30`

`=28n^2+62n+30`