Question

How do you FOIL `(5x + 2)(2x - 1)`?

Answer 1

Given `(5x+2)(2x-1)`

the First terms are: `(5x)` and `(2x)`
the Outside terms are `(5x)` and `(-1)`
the Inside terms are `(2)` and `(2x)`, and
the Last terms are `(2)` and `(-1)`

`{: ("First ", (5x) xx (2x), " = ", 10x^2), ("Outside", (5x) xx (-1), " = ", -5x), ("Inside", (2) xx (2x), " = ", 4x), ("Last", (2) xx (-1), " = ", -2), ("- - - - - -", "- - - - - -", "- -", "- - - -"), (" ", " ", " ", 10x^2-x-2) :}`