document.write( "Question 319200: please help me solve this equation: The sum of two numbers is 8.5, their product is 18. Find the numbers..thanks very much \n" ); document.write( "
Algebra.Com's Answer #228552 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! please help me solve this equation: The sum of two numbers is 8.5, their product is 18. Find the numbers. \n" ); document.write( "---------------------------------------- \n" ); document.write( "x+y = 8.5 \n" ); document.write( "xy = 18 \n" ); document.write( "------------------ \n" ); document.write( "Solve using substitution: \n" ); document.write( "x = 8.5-y \n" ); document.write( "--- \n" ); document.write( "Substitute into xy = 18: \n" ); document.write( "(8.5-y)y = 18 \n" ); document.write( "-y^2 + 8.5y = 18 \n" ); document.write( "y^2 - 8.5y + 18 = 0 \n" ); document.write( "(y-4.5)(y-4) = 0 \n" ); document.write( "--- \n" ); document.write( "If y = 4.5, x = 4 \n" ); document.write( "If y = 4, x = 4.5 \n" ); document.write( "======================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |