SOLUTION: The area of a rectangular serving tray is given by the trinomial 3x2+17x−56. The tray's width is 3x−7. What is the length of the tray?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The area of a rectangular serving tray is given by the trinomial 3x2+17x−56. The tray's width is 3x−7. What is the length of the tray?      Log On


   

Question 1032577: The area of a rectangular serving tray is given by the trinomial 3x2+17x−56. The tray's width is 3x−7. What is the length of the tray?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
We can either long divide one by the other or merely factor
3x^2 + 17x - 56 = (3x - 7)(x + 8)
so that the length must be x + 8.