Problema Solution
Mack is 3 years older than Betty and the product of their ages is 180. How old is each
Answer provided by our tutors
Let x be the age of betty, then age of mack is x+3. As the product of their ages is 180, we have
x*(x+3)=180
x^2+3x-180=0
(x+15)(x-12)=
so x=-15 or x=12. But the age cannot be negative.
So betty is 12 and mack is 15