SOLUTION: Cha is two years older than Anna, and Marge is three years older than Cha. A year ago, the product of Anna’s age and Marge’s age was exactly equal to the square of Cha’s

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Question 1178629: Cha is two years older than Anna, and Marge is three years older
than Cha. A year ago, the product of Anna’s age and Marge’s age
was exactly equal to the square of Cha’s age. What is the current
age of each girl?
Answer by josgarithmetic(39620) About Me  (Show Source):
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Cha is two years older than Anna, and Marge is three years older
than Cha. A year ago, the product of Anna’s age and Marge’s age
was exactly equal to the square of Cha’s age. What is the current
age of each girl?
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Cha             n+2
Anna            n
Marge           n+5

One year ago: %28n-1%29%28n%2B4%29=%28n%2B1%29%5E2
You can take the steps from here.