Question

How do you write the product as a trinomial `(2r - 5)(r + 10)`?

Answer 1

`2r^2+15r-50`

Explanation:

Use the FOIL method (First, Outside, Inside, Last) to expand the product and then collect like terms to simplify. The answer will be a trinomial because it will have three terms.

`(2r-5)(r+10)=2r*r+2r*10-5*r-5*10=2r^2+20r-5r-50=2r^2+15r-50`