emmanuelcook68
emmanuelcook68 emmanuelcook68
  • 19-06-2017
  • Mathematics
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The area of a rectangular rug is given by the trinomial r^2-4r-77. What are the possible dimensions of the​ rug? Use factoring.

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irspow
irspow irspow
  • 19-06-2017
When you factor the equation...

r^2-4r-77

r^2+7r-11r-77

r(r+7)-11(r+7)

(r-11)(r+7)  so each parenthetical term is a dimension.

Note that r>11 though for any possible real solution. 
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