document.write( "Question 669410: the age of father exeeds to the square of the age his son by 4 years.the sum of the age of father and four times the age of his son is 64 years.find their ages.
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Algebra.Com's Answer #416516 by ankor@dixie-net.com(22740)\"\" \"About 
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let d = Dad's age
\n" ); document.write( "let s = don's age
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "the age of father exeeds to the square of the age his son by 4 years.
\n" ); document.write( "d = s^2 + 4
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\n" ); document.write( "the sum of the age of father and four times the age of his son is 64 years.
\n" ); document.write( "d + 4s = 64
\n" ); document.write( "Replace d with (s^2+4)
\n" ); document.write( "s^2 + 4 + 4s = 64
\n" ); document.write( "A quadratic equation
\n" ); document.write( "s^2 + 4s - 60 = 0
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\n" ); document.write( "(s+10)(s-6) = 0
\n" ); document.write( "the positive solution
\n" ); document.write( "s = 6 yrs is the son's age
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\n" ); document.write( "Find Dad's age
\n" ); document.write( "6^2 + 4 = 40 yrs
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\n" ); document.write( "check solutions in the 2nd statement
\n" ); document.write( "40 + 4(6) = 64\r
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