Question

Landrie wrote 7(2m + n) = 14m + n. What error did Landrie make? How should the expression be simplified?

Answer 1

`14m + 7n`

Explanation:

Landrie didn't expand the parenthesis properly using the Distributive Law.
It should be expanded as shown below:

`7(2m + n) = (7)(2m) + (7)(n)`

=
`14m + 7n`