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

1 Answer
Bill K.
Jul 22, 2015

2r^2+15r-502r2+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(2r−5)(r+10)=2r⋅r+2r⋅10−5⋅r−5⋅10=2r2+20r−5r−50=2r2+15r−50

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