The square of Johns age six years ago is equal to her age in six years time. What is his current age? Help? Please? :X

Follow Math Help Forum on Facebook and Google+

Originally Posted by jimmybob The square of Johns age six years ago is equal to her age in six years time. What is his current age? Help? Please? :X Let John's age be j, then we are told that: (j - 6)^2 = j + 6 simplifying this becomes: j^2 - 13 j + 30 = 0 Which has roots j=10 and j=3, but since for this to work j must be >6, the answer is 10. RonL

View Tag Cloud