Question

How do you factor the expression `7x(2x + 3) + (2x + 3)`?

Answer 1

`(7x + 1)(2x + 3)`

Explanation:

since we have `2x + 3` in both sets of brackets, we have a common theme. to expand the brackets, a "1" is implied at the beginning of the second set of brackets.

`7x(2x+3) + 1(2x+3)`

you can now make `(7x + 1)(2x + 3)` from that.