Question 10283
No equation is needed here.  You are given that "a teenager's age increased by 2 gives a perfect square".  The only perfect square that is within two years of a teenager's age would be 16.  The teenager must be 2 years less than that which would be 14.  Decrease that by 10 and you have 4, which is the square root of 16.  She is 5 years older than her brother, so he must be 9.


R^2 at SCC