C is 3 years younger than D. The product of their ages is 88. How old is each?



Representation:

  Let    x = age of D

     x - 3 = age of C





Equation



    x(x - 3) = 88

    x^2 - 3x = 88

    x^2 - 3x - 88 = 0

   (x - 11) (x + 8) = 0



  x - 11 = 0         x + 8 = 0

    x = 11             x = -8



No age that is negative so we reject the solution x = -8



Therefore D's age is 11 and C is 8.



 11- 3 = age of C



   8  = age of C





Visit my website:

http://onlinemathtutorial.tripod.com

 

RELATED QUESTIONS

Rosa is 8 years younger than dale. if the product of their ages is 105,how old is each... (answered by VFBundy,MathTherapy,greenestamps,ikleyn)

Paul is 3 years younger than his friend Peter. In seven years, the product of their ages... (answered by MRperkins)

Paul is 3 years younger than his friend Peter. In seven years, the product of their ages... (answered by MRperkins)

6.)	Paul is 3 years younger than his friend Peter. In seven years, the product of their... (answered by ankor@dixie-net.com)

Paul is 3 years younger than his friend Peter.In seven years, the product of their ages... (answered by Mathtut)

4. Marilyn is 3 years younger than her friend Rosie.  In 7 years, the product of their... (answered by josgarithmetic)

Gaurav is 3 years older than the twins, and five years younger than his sister. the sum... (answered by TimothyLamb)

Joe is three years younger than Mike. Fred is four years younger than Mike. The sum of... (answered by math_helper)

Henry's isiser is 3 years younger than Henry.  the product of ther ages is 180.  How old... (answered by Alan3354)