SOLUTION: Present age of a father is three years less than two times the square of his son's age. Difference of their ages is 42 years, what are their present ages.

Question 771442: Present age of a father is three years less than two times the square of his son's age. Difference of their ages is 42 years, what are their present ages.
Answer by Jc0110(165) (Show Source): You can put this solution on YOUR website!
Let the age of father to be x while of son to be y.
--> Equation 1

--> Equation 2 ... Substitute into Equation 1.

or
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
is not accepted as answer because the age of a person can't be in negative.
while
is accepted as answer.
When , ... Substitute into Equation 2

Therefore, the age of father is 47 while of son is 5.
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