SOLUTION: Hi, I solved this question , but not getting the correct answer which is 16m. Kindly help. Question-- The playing field at the local high school measures 140m by 50m. By incre

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Hi, I solved this question , but not getting the correct answer which is 16m. Kindly help. Question-- The playing field at the local high school measures 140m by 50m. By incre      Log On


   

Question 1126073: Hi,
I solved this question , but not getting the correct answer which is 16m. Kindly help.
Question--
The playing field at the local high school measures 140m by 50m. By increasing this rectangular area by the same amount on all sides, the new area will be exactly double the area of the field. By how much was each dimension increased, to the nearest metre?
Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


%28140%2Bx%29%2850%2Bx%29+=+2%2A%28140%2A50%29

A simple quadratic equation that does not factor. Find the answer using the quadratic formula or some tool like a graphing calculator.