Question

How do you factor `pr + 7p + tr + 7t`?

Answer 1

`pr+7p+tr+7t =(p+t)(r+7)`

Explanation:

Using factoring by grouping :

`pr+7p+tr+7t = (pr+7p)+(tr+7t)`

`=p(r+7)+t(r+7)`

`=(p+t)(r+7)`