document.write( "Question 824555: the age of a man is twice the square of his son. eight years hence,the age of the man will be 4 years more than three times the age of his son.find their present age \n" ); document.write( "
Algebra.Com's Answer #496588 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "x = man
\n" ); document.write( "y = son
\n" ); document.write( "---
\n" ); document.write( "x = 2yy
\n" ); document.write( "x + 8 = 3(y + 8) + 4
\n" ); document.write( "x + 8 = 3y + 24 + 4
\n" ); document.write( "-x + 3y + 20 = 0
\n" ); document.write( "-2yy + 3y + 20 = 0
\n" ); document.write( "---
\n" ); document.write( "the above quadratic equation is in standard form, with a=-2, b=3, and c=20
\n" ); document.write( "---
\n" ); document.write( "to solve the quadratic equation, by using the quadratic formula, copy and paste this:
\n" ); document.write( "-2 3 20
\n" ); document.write( "into this solver: https://sooeet.com/math/quadratic-equation-solver.php
\n" ); document.write( "---
\n" ); document.write( "this quadratic has two real roots (the x-intercepts), which are:
\n" ); document.write( "y = -2.5
\n" ); document.write( "y = 4
\n" ); document.write( "---
\n" ); document.write( "negative age doesn't make sense for this problem, so use the positive root
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "y = son = 4
\n" ); document.write( "x = man = 32
\n" ); document.write( "---
\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php \n" ); document.write( "
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